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1

Digitale Medien

Phylogenetic position of Dictyostelium inferred from multiple protein data sets (1995)

Kuma, Kei-ichi ; Nikoh, Naruo ; Iwabe, Naoyuki ; [weitere]

Springer

Journal of molecular evolution 41 (1995), S. 238-246

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ISSN: 1432-1432

Schlagwort(e): Cellular slime molds ; Animals ; Fungi ; Plantae ; Maximum-likelihood method ; Evolution

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract The phylogenetic position of Dictyostelium inferred from 18S rRNA data contradicts that from protein data. Protein trees always show the close affinity of Dictyostelium with animals, fungi, and plants, whereas in 18S rRNA trees the branching of Dictyostelium is placed at a position before the massive radiation of protist groups including the divergence of the three kingdoms. To settle this controversial issue and to determine the correct position of Dictyostelium, we inferred the phylogenetic relationship among Dictyostelium and the three kingdoms Animalia, Fungi, and Plantae by a maximum-likelihood method using 19 different protein data sets. It was shown at the significance level of 1 SE that the branching of Dictyostelium antedates the divergence of Animalia and Fungi, and Plantae is an outgroup of the Animalia-Fungi-Dictyostelium clade.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00170678

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2

Digitale Medien

Evolutionary relationships of eukaryotic kingdoms (1996)

Kumar, Sudhir ; Rzhetsky, Andrey

Springer

Journal of molecular evolution 42 (1996), S. 183-193

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ISSN: 1432-1432

Schlagwort(e): Small-subunit ribosomal RNA ; Phylogeny ; Animals ; Fungi ; Plants ; Alveolates ; Heterokonts ; Stramenopiles

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract The evolutionary relationships of four eukaryotic kingdoms—Animalia, Plantae, Fungi, and Protista—remain unclear. In particular, statistical support for the closeness of animals to fungi rather than to plants is lacking, and a preferred branching order of these and other eukaryotic lineages is still controversial even though molecular sequences from diverse eukaryotic taxa have been analyzed. We report a statistical analysis of 214 sequences of nuclear small-subunit ribosomal RNA (srRNA) gene undertaken to clarify these evolutionary relationships. We have considered the variability of substitution rates and the nonindependence of nucleotide substitution across sites in the srRNA gene in testing alternative hypotheses regarding the branching patterns of eukaryote phylogeny. We find that the rates of evolution among sites in the srRNA sequences vary substantially and are approximately gamma distributed with size and shape parameter equal to 0.76. Our results suggest that (1) the animals and true fungi are indeed closer to each other than to any other “crown” group in the eukaryote tree, (2) red algae are the closest relatives of animals, true fungi, and green plants, and (3) the heterokonts and alveolates probably evolved prior to the divergence of red algae and animal-fungus-green-plant lineages. Furthermore, our analyses indicate that the branching order of the eukaryotic lineages that diverged prior to the evolution of alveolates may be generally difficult to resolve with the srRNA sequence data.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02198844

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3

Digitale Medien

Animals as indicators of ecosystem responses to air emissions (1984)

Newman, James R. ; Schreiber, R. Kent

Springer

Environmental management 8 (1984), S. 309-324

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ISSN: 1432-1009

Schlagwort(e): Animals ; Indicators ; Air pollution ; Ecosystem responses

Quelle: Springer Online Journal Archives 1860-2000

Thema: Energietechnik

Notizen: Abstract With existing and proposed air-quality regulations, ecological disasters resulting from air emissions such as those observed at Copperhill, Tennessee, and Sudbury, Ontario, are unlikely. Current air-quality standards, however, may not protect ecosystems from subacute and chronic exposure to air emissions. The encouragement of the use of coal for energy production and the development of the fossil-fuel industries, including oil shales, tar sands, and coal liquification, point to an increase and spread of fossil-fuel emissions and the potential to influence a number of natural ecosystems. This paper reviews the reported responses of ecosystems to air-borne pollutants and discusses the use of animals as indicators of ecosystem responses to these pollutants. Animal species and populations can act as important indicators of biotic and abiotic responses of aquatic and terrestrial ecosystems. These responses can indicate long-term trends in ecosystem health and productivity, chemical cycling, genetics, and regulation. For short-term trends, fish and wildlife also serve as monitors of changes in community structure, signaling food-web contamination, as well as providing a measure of ecosystem vitality. Information is presented to show not only the importance of animals as indicators of ecosystem responses to air-quality degradation, but also their value as air-pollution indices, that is, as air-quality-related values (AQRV), required in current air-pollution regulation.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01868030

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4

Digitale Medien

Segmentation and tracking of piglets in images (1995)

McFarlane, N. J. B. ; Schofield, C. P.

Springer

Machine vision and applications 8 (1995), S. 187-193

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ISSN: 1432-1769

Schlagwort(e): Tracking ; Segmentation ; Pigs ; Animals ; Computer vision

Quelle: Springer Online Journal Archives 1860-2000

Thema: Informatik

Notizen: Abstract An algorithm was developed for the segmentation and tracking of piglets and tested on a 200-image sequence of 10 piglets moving on a straw background. The image-capture rate was 1 image/140 ms. The segmentation method was a combination of image differencing with respect to a median background and a Laplacian operator. The features tracked were blob edges in the segmented image. During tracking, the piglets were modelled as ellipses initialised on the blobs. Each piglet was tracked by searching for blob edges in an elliptical window about the piglet's position, which was predicted from its previous two positions.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01215814

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5

Digitale Medien

Animal Consciousness and Ethics in Asia and the Pacific (1997)

Macer, Darryl

Springer

Journal of agricultural and environmental ethics 10 (1997), S. 249-267

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ISSN: 1573-322X

Schlagwort(e): Animals ; Asia ; consciousness ; Australia ; Hong Kong ; India ; Israel ; Japan ; New Zealand ; The Philippines ; Russia ; Singapore ; Thailand

Quelle: Springer Online Journal Archives 1860-2000

Thema: Energietechnik , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Philosophie

Notizen: Abstract The interactions between humans, animals and the environment have shaped human values and ethics, not only the genes that we are made of. The animal rights movement challenges human beings to reconsider interactions between humans and other animals, and maybe connected to the environmental movement that begs us to recognize the fact that there are symbiotic relationships between humans and all other organisms. The first part of this paper looks at types of bioethics, the implications of autonomy and the value of being alive. Then the level of consciousness of these relationships are explored in survey results from Asia and the Pacific, especially in the 1993 International Bioethics Survey conducted in Australia, Hong Kong, India, Israel, Japan, New Zealand, The Philippines, Russia, Singapore and Thailand. Very few mentioned animal consciousness in the survey, but there were more biocentric comments in Australia and Japan; and more comments with the idea of harmony including humans in Thailand. Comparisons between questions and surveys will also be made, in an attempt to describe what people imagine animal consciousness to be, and whether this relates to human ethics of the relationships.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1007774409131

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6

Digitale Medien

Masthead (1925)

New York, NY : Wiley-Blackwell

Journal of Morphology 40 (1925)

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050400301

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7

Digitale Medien

The formation of the sex glands and germ cells of mammals I. The origin of the germ cells in the albino rat (1925)

Hargitt, Geo. T.

New York, NY : Wiley-Blackwell

Journal of Morphology 40 (1925), S. 517-557

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: An early segregation of germ cells and migration through a germ track into the gonad does not occur in the albino rat. The germ cells are produced only from the peritoneum of the genital region and their earliest formation is coincident with the thickening of the coelomic epithelium to form the genital ridge. This takes place eleven days after insemination in embryos of approximately 18 somites. Germ cells continue to form from the peritoneum during the early development of the gonad. The peritoneum of this region also produces mesenchyme, smaller cells of the gonads, and the germinal epithelium.The argument for the specific character of the germ cells in vertebrates and their continuity from the egg is based largely upon assumption, and not upon substantial observations, and must be discarded. Germ-cell origin is a problem of cellular differentiatio, and not of early segregation.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050400305

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8

Digitale Medien

Errata (1925)

New York, NY : Wiley-Blackwell

Journal of Morphology 41 (1925), S. ii

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050410102

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9

Digitale Medien

The growth and chemical composition of three species of turtles fed on rations of pure foods (1925)

Pearse, A. S. ; Lepkovsky, S. ; Hintze, Laura

New York, NY : Wiley-Blackwell

Journal of Morphology 41 (1925), S. 191-216

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: Painted turtles, gopher tortoises, and terrapins were fed on various mixtures of sand, salts, dextrin, casein, cod-liver oil, wheat, eggs, lettuce, and meal worms. Each individual was weighted weekly for about a year and then killed for analysis, the water, ash, nitrogen, and fat being determined. Some individuals increased in weight as much as 75 per cent, others lost weight. Judged by growth and chemical analyses, the food requirements of chelonians, as representative poikilothermal vertebrates toward nutritive substances (including vitamines) are similar to those of homoiothermal animals.

Zusätzliches Material: 13 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050410109

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10

Digitale Medien

Natural partial fertilization in fasciolaria (1925)

Hyman, O. W.

New York, NY : Wiley-Blackwell

Journal of Morphology 41 (1925), S. 267-281

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: Of the eggs laid by Fasciolaria about 1 per cent develop into veligers, about 2 per cent more undergo a few cleavage divisions, and about 97 per cent do not divide at all. The 99 per cent that fail to develop normally are ‘swallowed’ by the veligers. This study concerns itself chiefly with the ova that do not divide. Notes on normal development and on the ova that undergo atypical cleavage are included.All of the ova are found to be typical when passed from the ovary. To each ovum one to several sperms become attached at the vegetal pole in the region of a mass of undifferentiated protoplasm - the ‘polar mass.’ A fertilization cone forms in each ovum and a fertilization membrane. In typical development a yolk lobe is formed, the sperm enters in the usual way, and fertilization is completed as in many other mollusks. In 97 per cent of the ova the yolk lobe is not formed and the sperm does not enter. In these cases the wall of the egg nucleus remains intact a long time. The nucleus itself and the ‘polar mass’ sink into the egg and meet at the center. Then the nuclear wall disappears and an atypical diaster is formed. However, cleavage is not begun and the chromosomes form vesicles that remain near the center of the ovum until it is ‘swallowed’ and digested by the veliger.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050410112

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11

Digitale Medien

The histology of the blood of perophora viridis (ascidian)The observations here recorded were made at the United States Biological Station, Beaufort, North Carolina. I wish to express my gratitude to Hon. Henry O'Malley, Commissioner of Fisheries, for the privilege of using the laboratory, and to Mr. Charles Hatsell, acting director of the station, for the many courtesies extended to me during the course of the work. (1926)

George, W. C.

New York, NY : Wiley-Blackwell

Journal of Morphology 41 (1926), S. 311-331

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The blood of Perophora viridis is found to contain six types of cells: (1) Green cells, which have green-colored fatty bodies embedded in clear cytoplasm. (2) Orange cells, with orange-colored bodies of unknown composition in the cytoplasm. (3) Colorless berry-like cells, with fluid-filled vesicles in the cytoplasm. (4) Granular amoeboid cells. (5) Compartmental amoeboid cells, which have box-like vacuoles containing brownian granules of a fatty substance. (6) Vesicular, signet-ring type of cell having a single large vacuole. The cytological structure of these cells and their reaction to various dyes are described.An effort has been made to homologize the types of cells found in the blood of other ascidians with those found in Perophora.It is concluded that the variety of colors found in the cells of ascidian blood is due to the varying chemical states of the vanadium-containing chromogen present in the cells.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050410203

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12

Digitale Medien

Masthead (1926)

New York, NY : Wiley-Blackwell

Journal of Morphology 42 (1926)

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050420101

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13

Digitale Medien

The metabolic gradients of vertebrate embryos. II. The brook lamprey (1926)

Hyman, L. H.

New York, NY : Wiley-Blackwell

Journal of Morphology 42 (1926), S. 111-141

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: Disintegration in killing agents was studied throughout development. In the unfertilized egg and cleavage stages the death gradient runs from animal to vegetal pole. In the late blastula stage the future dorsal surface and future point of gastrulation show heightened susceptibility. The gastrula has a gradient from anterior to posterior end along its dorsal surface, with a slight reverse gradient around the blastopore; lateral and ventral regions are least susceptible.Before and after the appearance of the neural groove, the dorsal surface shows increased susceptibility with gradient in it from anterior to posterior end. The neural tube is highly susceptible, with a death gradient from anterior to posterior end and a slight reverse gradient at its posterior end.During late stages and in the larva the double gradient is present; death begins at the two ends and progresses backward from head, forward from anus; from the former most rapidly. The least susceptible place is near the posterior end. The posterior reverse gradient is less developed in the lamprey than in other vertebrate embryos, due, probably, to its lack of a tail bud.Assuming that death differences indicate differences in rate of activity, it appears that such differences in activity may be causes and not results of developmental processes, for the development of certain parts (dorsal surface, blastopore, central nervous system) is indicated by heightened activity before it is evident morphologically.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050420105

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14

Digitale Medien

Branchiomerism and the theory of head segmentation (1926)

Kingsbury, B. F.

New York, NY : Wiley-Blackwell

Journal of Morphology 42 (1926), S. 83-109

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The summary of this paper is as follows:1A critical review of the developmental evidence shows that the branchial pouches are formed in cephalocaudal sequence subsequently to the segmentation of the dorsal mesoderm.2The pouches interrupt a continuous sheet of mesoderm to form the branchial arches.3The arches when formed do not correspond topographically to the dorsal somites.4Branchiomerism does not therefore coincide with somitic metamerism.3The branchial structures do not support the theory of head segmentation.3The nervi trigeminus, facialis, glossopharyngeus, and vagus cannot be regarded as segmental nerves.3There is no evidence that branchial pouches or arches have been elided from the series.3The problem of meristic homology is briefly discussed.

Zusätzliches Material: 2 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050420104

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15

Digitale Medien

Freezing and survival of insects at low temperatures (1927)

Payne, Nellie M.

New York, NY : Wiley-Blackwell

Journal of Morphology 43 (1927), S. 521-546

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The literature on the general subject of freezing and survival both in plants and in animals is briefly reviewed and a bibliography given. Insects representing three ecological groups, (1) the oak borers - exposed to temperature extremes normally; (2) stored-products insects representing supposedly a tropical or subtropical group, and, (3) aquatic insects never exposed to temperatures lower than 0°C., were chosen for this study. Determinations of the freezing and undercooling points were made during the yearly cycle.Both the stored-products insects and the aquatic insects studied showed no periodicity in freezing or undercooling. The oak borers showed marked periodicity. The freezing-point varies directly with the moisture content. Cold-hardiness was produced experimentally by, (1) exposure of insects to low temperatures and, (2) by dehydration. Loss of cold-hardiness was produced experimentally by combinations of high temperature, food, and high relative humidity. The freezing-point ordinarily found corresponds with that of the blood. Repeated freezings of the same insect or tissue showed no hysteresis. There exists in certain insects a secondary freezing-point below that ordinarily found. Oak borers in summer condition die at the first freezing-point; in fully hardened condition they die at the secondary freezingpoint.

Zusätzliches Material: 8 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050430209

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16

Digitale Medien

Ant-mounds as to temperature and sunshine (1927)

Andrews, E. A.

New York, NY : Wiley-Blackwell

Journal of Morphology 44 (1927), S. 1-20

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The ant Formica exsectoides F. builds mounds with some reference to sunlight, and measurements of internal temperatures have shown them higher in upper parts of the mound, but different in different faces of the mound - all higher than the earth outside the mound.Inside temperatures are not constant; they are due to the sunshine. The mound is so fabricated that the internal temperatures are conserved during the night. The ants make use of the differential internal temperatures for rearing broods.Some mounds show bilateral symmetry dependent upon sun exposure.Measurements of rate of running of these ants show a falling off with lower temperatures, and possibly this is one factor in the smaller development of northerly aspects of these mounds.

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050440102

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17

Digitale Medien

Parental chromosome dimensions in Ascaris. A study of the effect of cellular environment on chromosome size (1927)

Hance, Robert T.

New York, NY : Wiley-Blackwell

Journal of Morphology 44 (1927), S. 117-125

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: In the early cleavage stages of Ascaris the homologous chromosomes are of unequal length. Measurements show that these homologues fall into two sharply defined groups suggesting their biparental origin. The shorter are considered to have come from the male.As the age of the embryo increases, these differences between the chromosome mates tend to become less, and it is suggested that at some later period in the history of the animal this difference will entirely disappear in response to the effect of continued existence in a common environment. The length of the chromosomes is very slightly shortened during the early cleavage divisions, while the area of the equatorial cross-section of the cells becomes enormously reduced.

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050440106

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18

Digitale Medien

Oxygen consumption of individual pupae during metamorphosis (1927)

Taylor, Ivon R.

New York, NY : Wiley-Blackwell

Journal of Morphology 44 (1927), S. 313-339

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The rates of oxygen consumption of single pupae of blowflies (Phormia terraenovae, Phormia regina, Lucilia sericata), of the flesh fly (Sarcophaga sarracenioides Aldrich), of the Mediterranean flour moth (Ephestia kuehniella), and of the bee moth (Galleria mellonella) during metamorphosis, until emergence, have been determined. The record for each pupa, with the exception of those of blowflies, is practically continuous day and night during the period of pupal development which lasted from 140 to 300 hours, according to the species, at the temperatures used. During pupal development there is first a period of decrease in rate, which is later followed by a steady increase until a short time before emergence, when a sudden decrease occurs.The ‘oxygen curves’ of the blowfly pupae (Diptera) are quite different from those of the flour-moth and bee-moth pupae (Lepidoptera), although all are of the same general U-shaped type. There are strong indications of a specific difference in the curves of the blow-fly pupae. The flour-moth pupae curves differ slightly from those of the bee-moth pupae. During the major part of development the rates of O2 consumption of pupae of both sexes of bee moth and flour moth are about the same, but near the end of metamorphosis the females have higher rates than the males. No such sex difference appears among the dipterous pupae used.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050440205

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19

Digitale Medien

The formation of contractile vacuoles in Amoeba proteus (1927)

Day, Howard Calvin

New York, NY : Wiley-Blackwell

Journal of Morphology 44 (1927), S. 363-372

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The history of investigations on the contractile vacuole is reviewed briefly and brought up to date.The study of the contractile vacuole in Amoeba proteus is considered from standpoints of origin, structure, behavior, and function. The results are obtained from a prolonged study of normal organisms and from their reactions when introduced into conductivity water.The origin of vacuoles is studied by means of dark-field illumination which reveals the vacuole to be formed from a fusion and coalescence of extremely minute droplets.The retaining ‘wall’ of the contractile vacuole is not a permanent structure, but is in the nature of a condensation membrane, totally disappearing with each contraction.The loci of the contractile vacuoles are not permanent, but vacuoles are formed more or less at random. It is unlikely that they are supported in gelated areas, for amoebae with a dozen vacuoles are quite active and there is no interference with amoeboid movement.Conductivity water increases the size, number, and rate of contraction of contractile vacuoles, which suggests that they may function in maintaining an osmotic gradient as well as in the elimination of metabolic waste.

Zusätzliches Material: 6 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050440207

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20

Digitale Medien

Developmental modification and elimination of the larval stage in the ascidian, Corella willmeriana (1927)

Child, C. M.

New York, NY : Wiley-Blackwell

Journal of Morphology 44 (1927), S. 467-514

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The eggs of Corella develop in the atrial chamber of the parent at a pH below that of normal sea-water (pH 7.4 ±). When removed to normal sea-water in early stages and under certain other experimental conditions, larval development is more or less inhibited, the tail being most inhibited, the dorsal region somewhat less. The free larval stage may be eliminated and later development and metamorphosis may proceed normally to an advanced stage in the chorion and give rise to normal ascidians. The region most inhibited are, in general, those which possess the highest reducing power, as indicated by KMnO4. Experiments made in the attempt to control development all agree in indicating that the early stages are adjusted to a certain CO2 concentration approximately that of the atrial chamber and presumably near that of the body. Solutions of the same pH may or may not inhibit development according to their CO2 content.The tail, the region of highest reducing power in the embryo during its development, is most inhibited; the dorsal region, the next most rapidly reducing region, is next in degree of inhibition. All differences in reducing power disappear when, or soon after, the animals are killed by other agents before treatment with KMnO4.

Zusätzliches Material: 64 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050440305

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21

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The comparative morphology of the secondary sexual characters of elasmobranch fishes. The claspers, clasper siphons, and clasper glands, together with a dissertation on the Cowper's glands of Homo. Memoir XIThe figures are executed from the author's dissections and preparations by Miss Edith C. Humphreys, to whom best thanks are tendered. (1926)

Leigh-Sharpe, W. Harold

New York, NY : Wiley-Blackwell

Journal of Morphology 42 (1926), S. 349-358

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The claspers of Centrina are adnate with the pelvic fin and bear a spine as in other Spinacidae. Mustelus canis resembles M. lunulatus rather than M. vulgaris. The claspers of Chiloscyllium end in a pointed spike. Pseudotriakis resembles the Carchariidae. The three North American Atlantic species of the genus Raia are considered, and R. laevis and R. erinacea are placed in the pseudogenus containing R. batis, and a new pseudogenus erected for R. ocellata. A gross and histological account is given of the Cowper's glands of Homo, and they are shown to be homoplastic with clasper glands, similar in structure, arrangement, development, and function.

Zusätzliches Material: 12 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050420112

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22

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A new dorsal gland in the ground-squirrel, Callospermophilus, with a note on its anal glandThe author wishes here to acknowledge his gratitude to those who contributed to this investigation. The collection of dry skins in the American Museum of Natural History was placed at my disposal. The United States National Museum and the Museum of Vertebrate Zoölogy, University of California, kindly lent alcoholic specimens. The Museum of Zoölogy, University of Michigan, supported the field work. The use of the Alpine Laboratory of the Carnegie Institution of Washington was courteously granted. The author is indebted to Mr. C. H. Willey for his care in the preparation of the slides for microscopic study. (1926)

Hatt, Robert Torrens

New York, NY : Wiley-Blackwell

Journal of Morphology 42 (1926), S. 441-451

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: In the golden-mantled ground-squirrel, Callospermophilus, a spatulate glandular area has been noted in the skin of the back. It has been found in the following species: C. l. lateralis, C. l. arizonensis, C. l. caryi, C. l. saturatus, C. l. tescorum, C. c. chrysodeirus, and C. bernardinus. Probably it is common to the genus.The individual glands making up this area are modified and enlarged sudoriparous glands. They are divided into a tightly coiled and branched fundus, a large sinus, and a duct which passes caudad and outward to its exit at the surface.The glands secrete a strongly smelling oil, which is probably left on vegetation and other objects in the animal's environment and serves as a source of information to other members of the species. The glands are more active in spring and summer than in winter. They are stimulated by excitement. While present in both sexes, both adult and juvenile, they are best developed in adult males.Callospermophilus has three anal glands. These have flat-topped, straight-sided nipples which are protruded from the anus if the animal is frightened. A milky substance with a very weak odor can be extruded.

Zusätzliches Material: 11 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050420204

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23

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Studies in mammalian spermatogenesis VI. The chromosomes of the rabbitContribution no. 201 from the Department of Zoölogy, University of Texas. The writer was aided in this study by a grant from The Committee for Research on Sex Problems of the National Research Council. (1926)

Painter, Theophilus S.

New York, NY : Wiley-Blackwell

Journal of Morphology 43 (1926), S. 1-43

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The study is divided into three parts. Part I deals with the chromosome number and morphology in the amniotic cells of rabbit embryos. The number of chromosomes has been found essentially constant in amniotic cells of young, but more variable in older embryos. The somatic number is 44. Part II deals with the chromosomes of race crosses (Flemmish Giant X Polish) in which the homologous chromosomes were found to be alike. Part III deals with spermatogenesis. There are forty-four chromosomes in spermatogonia, and twenty-two in primary spermatocytes. The sex chromosomes are of the usual X-Y type.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050430102

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24

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Reversal of ciliary action in paramecium caudatumContribution from the Zoological Laboratory of the Johns Hopkins University and the Marine Biological Laboratory, Woods Hole. (1926)

Mast, S. O. ; Nadler, J. Ernest

New York, NY : Wiley-Blackwell

Journal of Morphology 43 (1926), S. 105-117

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Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: 1Monovalent cation salts induce reversal in the direction of the stroke of the cilia; bivalent and trivalent cation salts with a few exceptions do not. Some acids induce reversal, others do not.2The duration of reversed action varies with the kind of salt and with the concentration. As the concentration increases, the duration of reversed action increases to a maximum and then decreases to zero.3Bivalent and trivalent cation salts neutralize the effect of monovalent cation salts. The relative amount required varies with the kind of salt used and with the concentration.4The amount of a given salt required to neutralize another salt is not proportional to the concentration of the salt neutralized. Weber's law does not hold.5The results seem to indicate that ciliary reversal is associated with differential adsorption and consequent changes in electric potential, but that there are also other factors involved.

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050430106

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25

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Photoreceptors of Lumbricus terrestris, with special reference to their distribution, structure, and functionThis study was made at the zoölogical laboratory of The Johns Hopkins University and The Marine Biological Laboratory, Woods Hole, though chiefly at the former. (1925)

Hess, Walter N.

New York, NY : Wiley-Blackwell

Journal of Morphology 41 (1925), S. 63-93

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: A special type of cell, called ‘Lichtzellen’ by Hesse, was found in the photosensitive regions of the earthworm. Wherever the epidermis is most sensitive to light these cells are most abundant. They are found in the epidermis of all segments of the body and also in nerve enlargements of the prostomium and the caudal segment, but the intersegmental and ventral regions of the different segments, except the more distal ones, contain none of them. They are supplied by nerves and each contains a characteristic inner structure, the optic organelle, composed of a large central hyaline structure, the lens, which is surrounded by a dense network of nerve fibrillae, the retinella. In hanging drops the lens was found to focus light in the region of the retinella irrespective of the direction of the rays.These cells are similar in structure and function to the visual cells in leeches. Available data indicate that these cells function as photoreceptors and that the fibrillae of the retinella are the direct receptors of light stimuli.Pigment is not associated with the photoreceptors in a way that suggests direct functional relationship, but there is a subepidermal pigment layer through which pinhole windows admit light along the path of nerves to each of the nerve enlargements containing photoreceptor cells. These windows open in such directions as to determine the direction of withdrawal of the worm.

Zusätzliches Material: 18 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050410105

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26

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Studies on the physiology of the liver VI. The effect of total removal of the liver in lower vertebratesContribution from the United States Fisheries Biological Station, Fairport, Iowa, and the Mayo Clinic. Read before Section F (Zoölogical Sciences) at the seventy-eighth meeting of the American Association for the Advancement of Science and the American Society of Zoölogists, Cincinnati, Ohio, December 27, 1923, to January 2, 1924. (1925)

Magath, Thomas B. ; Mann, Frank C.

New York, NY : Wiley-Blackwell

Journal of Morphology 41 (1925), S. 183-189

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The effect of removal of the liver has been noted in fishes, frogs, and turtles. As in the higher vertebrates, removal of the liver produced a fall in blood sugar and a loss in muscular tone. The lower vertebrates failed to respond to intravenous injections of glucose, as do the birds and mammals. They also fail to respond to maltose or levulose. The liver maintained the blood-sugar level in the lower vertebrates, which is necessary for the maintenance of life.The mechanism of carbohydrate metabolism in the lower vertebrates may be different from that in the higher ones, in that glucose, when injected intravenously, apparently exercises a progressively less beneficial effect on the characteristic hypoglycemic condition which follows the removal of the liver of mammals and cold-blooded vertebrates.

Zusätzliches Material: 2 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050410108

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27

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Modification of development on the basis of differential susceptibility to radiation I. Fundulus heteroclitus and ultraviolet radiation (1925)

Hinrichs, Marie A.

New York, NY : Wiley-Blackwell

Journal of Morphology 41 (1925), S. 239-265

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Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: This paper reports experiments with Fundulus heteroclitus to modify larval development by means of ultraviolet radiation. Eggs were exposed to radiation at various intervals after fertilization for varying periods of time. The results accord with previous work on fish teratology, and the developmental types obtained are essentially similar to those produced by chemicals, cold, and hybridization. The deviations from normal development occur in the same body regions as do those in other vertebrates whose early development has been modified by the action of radiation (x-rays, radium, etc.).The results of these experiments indicate that there is a non-specificity in susceptibility relations with the production of similar types of monsters for widely different reagents. That these eggs are differentially susceptible to the action of ultraviolet radiation is indicated by the fact that those regions which have the highest metabolic activity when an inhibiting influence is active are the ones most generally affected. Thus modifications of the nervous system, sense organs, circulatory system, tail region, and body axis result, respectively, in the production of varying degrees of cyclopia, inadequate circulation, short, stubby or bent, non-motile tails (some bifid), and anterior twinning.As these modifications may be produced by applying inhibiting influences during the first few minutes after fertilization, it is evident that there is in the egg at this stage some constitutional or physiological basis which determines early differences in susceptibility of its various parts.

Zusätzliches Material: 31 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050410111

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28

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The nature and inheritance of webbed toes in man (1926)

Straus, William L.

New York, NY : Wiley-Blackwell

Journal of Morphology 41 (1926), S. 427-439

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: Webbing of toes or fingers in man is produced by a local arrest of development, causing retention of the normal embryonic webbing. This type of digital fusion involves only the skin, the skeleton being unaffected. The extensor tendons of the toes may sometimes be fused.Webbed digits occur normally in some marsupials, rodents, and insectivores, in a number of lemurs and catarrhines, and in the siamang and gorilla. They also may occur in varying degree in other Primates, notably Hylobates. An analysis of five new pedigrees together with those already published demonstrates that webbing of toes in man may be inherited in either a mendelian or sex-linked manner. In one case this character follows the course of the Y-chromosome.

Zusätzliches Material: 19 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050410206

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29

Digitale Medien

Masthead (1928)

New York, NY : Wiley-Blackwell

Journal of Morphology 45 (1928)

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Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050450101

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The effects of certain physical and chemical factors on locomotion and others life-processes in Amoeba proteusThis investigation was suggested by Prof. S. O. Mast and carried out under his direction. He has also furnished valuable aid in the presentation of the results. For these favors, I am greatly indebted to him. (1928)

Hopkins, D. L.

New York, NY : Wiley-Blackwell

Journal of Morphology 45 (1928), S. 97-119

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: Amoeba proteus was raised in a modified and diluted Ringer solution. When the pH of this culture medium became less than 6.0, the normal activities of the amoebae were interfered with; and when a still lower pH was attained, the amoebae died off. The same was true when the pH became greater than 8.0. At neutrality the activities were subnormal, very dark, and rounded. The rate of locomotion of amoebae raised in solutions with a pH less than 7.0 showed a maximum rate of locomotion at pH 6.6, which decreased as the pH changed in either direction, dropping to a very low rate at pH 7.0 and above and also below 6.0. For amoebae raised at a pH above 7.0 the rate was maximum at pH 7.6 and decreased as the pH changed in either direction; it was low at pH 7.0 and below and also above 8.0.On increasing the external osmotic pressure of the medium it was found that the effects caused varied somewhat with the hydrogen-ion concentration. Small increases in osmotic pressure decreased the rate from the normal at pH 6.0 and 8.0, increased it at pH 6.6 and 7.6, and did not affect it at pH 7.0. Osmotic pressures above that produced by M/20 lactose caused locomotion to cease in a short time at all pH values.

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050450104

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31

Digitale Medien

The cranial musculature of the toadfish (Opsanus tau) (1928)

Pankratz, David S.

New York, NY : Wiley-Blackwell

Journal of Morphology 45 (1928), S. 209-231

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Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The highly specialized cranial musculature of the toadfish is characterized by the following features: 1Absence of intermandibularis and branchiomandibularis muscles.2Presence of levator premaxillaris muscle.3Very large branchial chamber, the outer wall of which is formed by seven branchiostegal rays connected by a strong fascia provided with muscles (oblique levators and adductors).4Highly developed masticator muscles (adductor mandibularis and pterygoids).5The rectus abdominis, sternohyoid, and hyohyoid muscles are attached by a median aponeurosis to the hyoid and basibranchial elements and directly to the hypobranchial cartilages; this muscle complex depresses the buccal floor in opposition to the geniohyoid.6The pelvic fins are in the jugular position.7Two narrow muscles connect the cleithrum with the fourth ceratobranchial.8The cranial musculature is obviously adapted to a carnivorous habit and particularly for increasing respiratory capacity under asphyxial conditions.

Zusätzliches Material: 11 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050450107

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32

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Spiral movement in man (1928)

Schaeffer, A. A.

New York, NY : Wiley-Blackwell

Journal of Morphology 45 (1928), S. 293-398

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Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: Blindfolded persons walk, run, swim, row, and drive automobiles in clock-spring spiral paths of greater or less regularity when attempting a straightaway. The spirals turn either right or left in one and the same individual, and may do so even in one experiment. But either right or left turns predominate in the great majority of individuals, often to a high degree. The paths show marked individuality, and there is some ground for thinking there exists a correlation between temperamental differences and general character of path.The mechanism which produces the spiral path is not located in the locomotor organs, but in the central nervous system and is probably identical essentially with the spiral mechanism in other motile organisms, all of which move in spiral paths when there are no guiding senses to direct the path. The clock-spring spiral in man is interpreted as the expression in two dimensions of space of a helical spiral mechanism which seems to exist in all motile organisms moving in three dimensions of space and in amebas which move in two dimensions. In a large number of lower organisms the number of body lengths per spiral turn is almost constant, being about 4.5. The smallest regular swimming spirals in man are very close to this value, but the smallest regular walking spirals are somewhat larger. The fundamental spiral mechanism seems to be of molecular dimensions, and there seems to exist a demonstrable locomotor bilateral asymmetry in very nearly, if not quite, all organisms.

Zusätzliches Material: 4 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050450110

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33

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The anatomy and life-history of a freshwater mollusk of the genus sphaeriumContributions from the Zoölogical Laboratory of the University of Illinois, no. 317. (1928)

Monk, Cecil R.

New York, NY : Wiley-Blackwell

Journal of Morphology 45 (1928), S. 473-503

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Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: A detailed study has been made of the anatomy of one of the fingernail shells, and preliminary observations on the life-history have been carried out. In its general organization Sphaerium notatum is very similar to the larger fresh-water lamellibranchs. A gastric shield, crystalline style, and style sac, very similar to those found in the stomach and intestine of Lampsilis, are present. A pair of slender muscles extending from the dorsal side of the body into the gills, and evidently not previously described, have been found. The nervous system consists of the typical three pairs of lamellibranchiate ganglia, with their connectives, accessory ganglia, and nerve fibers. Particular study was given to the statocysts and osphradia, and attention is called to the fact that the function commonly ascribed to the osphradia is incompatible with their position in the roof of the cloacal chamber.S. notatum, like all the Sphaeriidae, is hermaphroditic and viviparous. The gonads are paired racemose glands lying behind and below the stomach. The sperm-producing follicles form the anterior portion of each gonad and are somewhat smaller and more numerous than the ova-producing follicles which form the posterior portion. The young pass through the early stages of development in brood pouches in the gills and are expelled as relatively enormous individuals.Preliminary observations on the life-history indicate that reproduction reaches its height in the summer and that fertilization probably takes place during the late summer and fall.

Zusätzliches Material: 6 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050450204

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34

Digitale Medien

Developmental factors in teleost hybrids. I. The early mitotic behavior in the cross between menidia menidia notata ♀ and Prionotus carolinus ♂ (1928)

Pinney, Edith

New York, NY : Wiley-Blackwell

Journal of Morphology 45 (1928), S. 579-597

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Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: When Menidia eggs are fertilized with Prionotus sperm, the Prionotus chromosomes react in the Menidia cytoplasmic medium just as they do in the cytoplasm of Fundulus eggs. There is lagging, non-disjunction, and elimination of chromosomes during the early cell divisions. The mitotic behavior of the Prionotus sperm in the Menidia egg also resembles the behavior of the sperm of Ctenolabrus in the same medium. This behavior which was expected from what was known concerning the mitotic behavior of the reciprocal crosses between Menidia and Fundulus and between Ctenolabrus and Prionotus and other intercrosses between the members of these two groups is regarded as a function of the physical state of the egg cytoplasm during the division phase of mitosis. This physical character forms the earliest differential factor in the development of these hybrids and shows no correlation with the width of the cross.A comparison of nine teleost crosses, in which both the development and the early mitotic behavior are known, with a rough numerical estimate of the width of the cross brought out the fact that development is most successful in crosses between nearly related species if mitosis is normal and in distantly related crosses if mitosis is abnormal. This indicates that nuclear relationship is also a factor in the development of hybrids.

Zusätzliches Material: 2 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050450208

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35

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Growth of paramecia in pure cultures of pathogenic bacteria and in the presence of soluble products of such bacteriaSubmitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Graduate School of the University of Missouri. (1928)

Philpott, C. H.

New York, NY : Wiley-Blackwell

Journal of Morphology 46 (1928), S. 85-129

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Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: Virulent hay-infusion cultures of Bacillus pyocyaneus are toxic to pure-line races of three species of paramecia, but these races may acquire a tolerance for this toxic agent. Races with acquired tolerance have been grown for long periods of time in toxic, pure cultures of B. pyocyaneus by means of the daily-isolation culture method, and here the average division rate is as high as, or higher than, in the chance-mixed bacterial cultures in which these protozoa are usually maintained in the laboratory. The tolerance is lost, however, when the paramecia are removed from the toxic cultures and grown for a number of generations in cultures of non-toxic bacteria.The toxic agent that is lethal to paramecía is probably the soluble toxin of B. pyocyaneus. The investigation shows that the agent is soluble and either thermolabile or volatile. It also shows that all deleterious substances, other than the soluble toxin, known to be produced in cultures of this bacillus, are non-lethal to paramecia.Hay-infusion cultures of Bacillus enteritidis were lethal to paramecia. All attempts to develop tolerance in paramecia for the toxic agent in these cultures failed.Under the experimental conditions that prevailed, diphtheria toxin was found to have no appreciable effect upon the division rate or death rate in three species of paramecia.

Zusätzliches Material: 6 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050460104

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36

Digitale Medien

Masthead (1940)

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940)

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Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050660101

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Digitale Medien

Dedication (1940)

Diller, Irene Corey ; Parmenter, Charles L. ; Wenrich, D. H.

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 1-2

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Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

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Thema: Biologie , Medizin

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To Dr. C. E. McClung on reaching the age of seventy (1940)

Lillie, Frank R.

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 5-9

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Immediate effects of 250 R of X-rays on the different stages of mitosis in neuroblasts of the grasshopper, Chortophaga viridifasciata (1940)

Carlson, J. Gordon

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 11-23

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URL: http://dx.doi.org/10.1002/jmor.1050660104

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Fossil bird remains from tertiary deposits in the United States (1940)

Wetmore, Alexander

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 25-37

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URL: http://dx.doi.org/10.1002/jmor.1050660105

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The significance for the theory of heredity of the reduction in the number of body segments in Drosophila melanogaster through rigorous selection (1940)

Green, Wyman R.

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 67-97

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URL: http://dx.doi.org/10.1002/jmor.1050660107

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The life cycle and morphology of Nematopsis ostrearum, sp. Nov. a gregarine parasite of the mud crab and oysterPublished by permission of the U.S. Commissioner of Fisheries. (1940)

Prytherch, Herbert F.

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 39-65

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URL: http://dx.doi.org/10.1002/jmor.1050660106

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The anatomy of Succinea chrysis Westerlund (Mollusca, Gastropoda) (1940)

Hanna, G. Dallas

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 115-129

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URL: http://dx.doi.org/10.1002/jmor.1050660109

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The fertilizability of nucleated and non-nucleated fragments of centrifuged Nereis eggsAided, in part, by a grant from the Smith Research Fund of the University of North Carolina. I am indebted to Helen M. Costello for the drawings which illustrate this paper, and for assistance in the experiments. The experiments were performed at the Marine Biological Laboratory during the summers of 1938 and 1939, and have been reported in abstract (Costello, 1938 a, b, c). (1940)

Costello, Donald Paul

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 99-114

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The development and fate of the urinogenital sinus in the opossum, Didelphys virginiana (1940)

McCrady, Edward

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 131-154

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URL: http://dx.doi.org/10.1002/jmor.1050660110

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The chimpanzee ovum in the early stages of implantation (about 10 1½ days) (1940)

Heuser, Chester H.

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 155-173

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URL: http://dx.doi.org/10.1002/jmor.1050660111

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The internal genitalia of female Thrinchinae, Batrachotetriginae, Pamphaginae and Pyrgomorphinae (Orthoptera, Acrididae) (1940)

Slifer, Eleanor H.

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 175-195

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Masthead (1940)

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940)

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Nuclear structure and nuclear division in the trophic stages of Entamoeba muris (Protozoa, Sarcodina) (1940)

Wenrich, D. H.

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 215-239

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URL: http://dx.doi.org/10.1002/jmor.1050660203

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The nature of hybrid sterility - abnormal development in eggs of hybrids between Drosophila miranda and Drosophila pseudoobscura (1940)

Kaufmann, B. P.

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 197-213

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URL: http://dx.doi.org/10.1002/jmor.1050660202

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The differentiation of isolated gills of the amphibian embryo (1940)

Moser, Floyd

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 261-275

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URL: http://dx.doi.org/10.1002/jmor.1050660205

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Chromomere vesicles in orthopteran cells (1940)

Corey, H. Irene

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 299-321

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URL: http://dx.doi.org/10.1002/jmor.1050660207

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The effect of testosterone propionate on the early development of the reproductive ducts in the female sparrow hawk (Falco sparverius sparverius) (1940)

Nelsen, Olin E. ; Stabler, Robert M.

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 277-297

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Chromosome numbers in Rana fusca parthenogenetically developed from eggs with known polar body and cleavage historiesThe early part of this work was done at the laboratory of Prof. A. M. Dalcq at the University of Brussels to whom I am deeply grateful for generous hospitality and counsel. The remainder has been done at the Marine Biological Laboratory at Woods Hole, Massachusetts, and the University of Pennsylvania. To the National Research Council, the National Academy of Sciences and the Research Committee at the University of Pennsylvania I am indebted for grants-in-aid. Finally, for invaluable assistance in the experimental phases of this work I have to thank my wife, Hazeltene S. Parmenter. (1940)

Parmenter, C. L.

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 241-260

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URL: http://dx.doi.org/10.1002/jmor.1050660204

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Multiple alleles in sex determination of HabrobraconThe author is indebted to the American Philosophical Society for grants from the Penrose Fund under which many of the more recent data reviewed in this paper have been collected. (1940)

Whiting, P. W.

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 323-355

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URL: http://dx.doi.org/10.1002/jmor.1050660208

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Cryptochilidium (Cryptochilum) bermudense, a ciliate from Bermuda sea urchinsContributions from the Bermuda Biological Station for Research No. 168. Funds for study at Bermuda Biological Station were furnished by Washington University School of Medicine, St. Louis. Manuscript prepared at Marine Biological Laboratory, Woods Hole, Massachusetts. (1940)

Lucas, Miriam Scott

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 369-390

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Mitosis in hair follicle cells of mice following x-radiation (1940)

Hance, Robert T.

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 409-422

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URL: http://dx.doi.org/10.1002/jmor.1050660302

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Cytogamy: A sexual process occurring in living joined pairs of Paramecium caudatum and its relation to other sexual phenomena (1940)

Wichterman, Ralph

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 423-451

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URL: http://dx.doi.org/10.1002/jmor.1050660303

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Histology of the gonad wall of Arbacia punctulata (1940)

Wilson, Louise Palmer

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 463-479

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URL: http://dx.doi.org/10.1002/jmor.1050660305

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The chromosomes and extranuclear material in the maturing germ cells of a frog lung fluke, Pneumonoeces similiplexus Stafford (1940)

Pennypacker, Miriam I.

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 481-495

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URL: http://dx.doi.org/10.1002/jmor.1050660306

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Variations in the accessory chromosomes in metaphase and anaphase of the first spermatocytes of the albino rat (1940)

Allen, Ezra

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 453-462

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URL: http://dx.doi.org/10.1002/jmor.1050660304

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Some characteristic otoliths of American ostariophysiContributions from the Zoological Laboratory of the University of Illinois, no. 544. (1940)

Adams, Leverett Allen

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 497-527

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URL: http://dx.doi.org/10.1002/jmor.1050660307

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The anatomy and histology of the alimentary tract of Radenotatum carinatum var. peninsulare Rehn and Hebard (Orthoptera: Acrididae) (1940)

Hodge, Charles

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 581-603

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URL: http://dx.doi.org/10.1002/jmor.1050660310

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Further studies on Nematocystis elmassiani (Protozoa; Sporozoa) from Oligochaete annelids (1940)

Troisi, Raphael A.

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 561-579

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URL: http://dx.doi.org/10.1002/jmor.1050660309

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Clarence Erwin McClung (1940)

Wenrich, D. H.

New York, NY : Wiley-Blackwell

Journal of Morphology 66 (1940), S. 635-688

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URL: http://dx.doi.org/10.1002/jmor.1050660312

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Masthead (1940)

New York, NY : Wiley-Blackwell

Journal of Morphology 67 (1940)

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The early development of the swim bladder and certain adjacent parts in hemichromis bimaculata (1940)

McEwen, Robert Stanley

New York, NY : Wiley-Blackwell

Journal of Morphology 67 (1940), S. 1-57

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Effects of x-rays upon the regeneration of feathers in the common fowl (1940)

de Boer, Benjamin

New York, NY : Wiley-Blackwell

Journal of Morphology 67 (1940), S. 299-319

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Intersexual gonads of turtle embryos following injection of male sex hormoneAided by grants from the National Research Council, Committee for Research in Problems of Sex, as administered by Prof. Emil Witschi. (1940)

Risley, Paul L.

New York, NY : Wiley-Blackwell

Journal of Morphology 67 (1940), S. 439-453

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URL: http://dx.doi.org/10.1002/jmor.1050670304

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A study of the cytoplasmic structures in the male germinal cells of several species of notonecta, with special reference to the golgi system (1940)

Richter, Kenneth M.

New York, NY : Wiley-Blackwell

Journal of Morphology 67 (1940), S. 489-521

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71

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The adult musculature of the anisopterous dragonfly thorax (odonata, anisoptera) (1940)

Clark, Harry Wellington

New York, NY : Wiley-Blackwell

Journal of Morphology 67 (1940), S. 523-565

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72

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The germ cells of the rabbit ovary from sex differentiation to maturity (1941)

Duke, Kenneth L.

New York, NY : Wiley-Blackwell

Journal of Morphology 69 (1941), S. 51-81

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73

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Masthead (1955)

New York, NY : Wiley-Blackwell

Journal of Morphology 96 (1955)

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74

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Masthead (1955)

New York, NY : Wiley-Blackwell

Journal of Morphology 96 (1955)

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75

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Some effects of X-rays on the germ cells of Chorthippus longicornis (Orthoptera) (1941)

Creighton, Margaret ; Evans, Byron H.

New York, NY : Wiley-Blackwell

Journal of Morphology 69 (1941), S. 187-205

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URL: http://dx.doi.org/10.1002/jmor.1050690108

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76

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The “opercularis” muscle of SalamandersContributions from the Department of Biology, Haverford College, No. 49. (1941)

Dunn, Emmett Reid

New York, NY : Wiley-Blackwell

Journal of Morphology 69 (1941), S. 207-215

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URL: http://dx.doi.org/10.1002/jmor.1050690202

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77

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The internal genitalia of Yucca moths, and their connection with the alimentary canal (1941)

Williams, Joseph L.

New York, NY : Wiley-Blackwell

Journal of Morphology 69 (1941), S. 217-223

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URL: http://dx.doi.org/10.1002/jmor.1050690203

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78

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The osteology of mylocheilus caurinum × ptychocheilus oregonense, a cyprinid hybrid, compared with its parental species forty-seven figures (1955)

Weisel, George F.

New York, NY : Wiley-Blackwell

Journal of Morphology 96 (1955), S. 333-357

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79

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Vascularization in the brains of reptiles. II. The cerebral capillary bed in Sphenodon punctatum (1941)

Craigie, E. Horne

New York, NY : Wiley-Blackwell

Journal of Morphology 69 (1941), S. 263-277

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URL: http://dx.doi.org/10.1002/jmor.1050690205

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80

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The male reproductive system in the nemertean genus CarcinonemertesContributions from the Zoological Laboratory of the University of Illinois, No. 590. (1941)

Humes, Arthur G.

New York, NY : Wiley-Blackwell

Journal of Morphology 69 (1941), S. 443-454

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URL: http://dx.doi.org/10.1002/jmor.1050690303

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81

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The nervous system of the kelp crab, Pugettia producta (1941)

Heath, James P.

New York, NY : Wiley-Blackwell

Journal of Morphology 69 (1941), S. 481-498

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82

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The feeding mechanisms of various ciliated protozoa (1941)

Lund, Everett Eugene

New York, NY : Wiley-Blackwell

Journal of Morphology 69 (1941), S. 563-573

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URL: http://dx.doi.org/10.1002/jmor.1050690309

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83

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The morphology of Trichomonas gallinae (= columbae) (1941)

Stabler, Robert M.

New York, NY : Wiley-Blackwell

Journal of Morphology 69 (1941), S. 501-515

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URL: http://dx.doi.org/10.1002/jmor.1050690306

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84

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Nuclear reorganization in the Family Colpodidae (1941)

Burt, R. L. ; Kidder, G. W. ; Claff, C. L.

New York, NY : Wiley-Blackwell

Journal of Morphology 69 (1941), S. 537-561

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URL: http://dx.doi.org/10.1002/jmor.1050690308

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85

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The electron microscopy of the lamprey spinal cordThis work was supported by grants to one of us (D. C. P.) from the United States Public Health Service. (1956)

Schultz, Robert ; Berkowitz, Ellis C. ; Pease, Daniel C.

New York, NY : Wiley-Blackwell

Journal of Morphology 98 (1956), S. 251-273

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URL: http://dx.doi.org/10.1002/jmor.1050980204

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86

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Variations of the histochemically demonstrable protein-bound sulfhydryl and disulfide groups in cells of the anterior pituitary gland under various endocrine conditionsThis study was supported in part by a grant from the National Institute of Arthritis and Metabolic Diseases (A-452), National Institutes of Health, Department of Health, Education and Welfare, and, in part, by an Institutional Grant to Harvard University from the American Cancer Society. (1956)

Ladman, Aaron J. ; Barrnett, Russell J.

New York, NY : Wiley-Blackwell

Journal of Morphology 98 (1956), S. 305-333

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Zusätzliches Material: 23 Ill.

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URL: http://dx.doi.org/10.1002/jmor.1050980206

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87

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The anatomy and development of the buccal glands of the lake lamprey (Petromyzon marinus Linnaeus) and the histochemistry of their secretionFrom a thesis submitted to the faculty of the Graduate School of Cornell University in partial fulfillment of the requirements for the degree of Master of Science. (1956)

Gibbs, Sarah Preble

New York, NY : Wiley-Blackwell

Journal of Morphology 98 (1956), S. 429-469

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URL: http://dx.doi.org/10.1002/jmor.1050980305

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88

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The inductive activity of the spinal cord in urodele tail regenerationSubmitted to the Department of Zoology of the University of Chicago in partial fulfillment for the degree of Doctor of Philosophy.This investigation was supported in part by a research grant no. B 493 from the National Institute of Neurological Diseases and Blindness of the National Institutes of Health, Public Health Service. (1956)

Holtzer, Sybil W.

New York, NY : Wiley-Blackwell

Journal of Morphology 99 (1956), S. 1-39

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Zusätzliches Material: 7 Ill.

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URL: http://dx.doi.org/10.1002/jmor.1050990102

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89

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A study of meiosis in coelomic and oviducal oocytes of Triturus viridescens, with particular emphasis on the origin of spontaneous polyploidy and the effects of heat shock on the first meiotic divisionPart of a dissertation presented to the faculty of Princeton University in candidacy for the degree of Doctor Of Philosophy. (1956)

Humphries, A. A.

New York, NY : Wiley-Blackwell

Journal of Morphology 99 (1956), S. 97-135

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URL: http://dx.doi.org/10.1002/jmor.1050990106

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90

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The Morphology Of An Acrothoracican Barnacle, Trypetesa LateralisThis paper represents part of a thesis submitted in partial satisfaction for the degree of Master of Arts in Zoology at the University of California at Berkeley, completed under the direction of Doctor Willard D. Hartman, to whom the author is indebted for encouragement and assistance. I would also like to thank Doctor Cadet Hand for suggesting the work to me and criticizing the manuscript, and Doctor Ralph I. Smith for his invaluable assistance and suggestions. (1955)

Tomlinson, Jack T.

New York, NY : Wiley-Blackwell

Journal of Morphology 96 (1955), S. 97-121

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URL: http://dx.doi.org/10.1002/jmor.1050960105

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91

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Cytochemical and histophysiological observations on the basophils of the anterior pituitary gland of the bat, myotis lucifugus lucifugus twenty-two figures (1955)

Siegel, John H.

New York, NY : Wiley-Blackwell

Journal of Morphology 96 (1955), S. 223-263

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Thema: Biologie , Medizin

Zusätzliches Material: 1 Ill.

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URL: http://dx.doi.org/10.1002/jmor.1050960203

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92

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The innervation of urodele limbs of reversed proximo-distal polarityA thesis submitted to the faculty of Princeton University in partial fulfillment of the requirements for the degree of Doctor of Philosophy. (1955)

David Deck, J.

New York, NY : Wiley-Blackwell

Journal of Morphology 96 (1955), S. 301-331

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Zusätzliches Material: 8 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050960206

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93

Digitale Medien

The postembryonic developmental stages of a fresh-water calanoid copepod, epischura massachusettsensis pearse (1955)

Humes, Arthur G.

New York, NY : Wiley-Blackwell

Journal of Morphology 96 (1955), S. 441-471

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URL: http://dx.doi.org/10.1002/jmor.1050960303

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94

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Histochemical studies of the ovarian nurse tissues and oocytes of the milkweed bug, oncopeltus fasciatus (dallas) I. Cytology, nucleic acids, and carbohydratesResearch supported by grants-in-aid from the American Academy of Arts and Sciences and the Marsh Fund of the National Academy of Sciences. (1955)

Bonhag, Philip F.

New York, NY : Wiley-Blackwell

Journal of Morphology 96 (1955), S. 381-439

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95

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Changes in the nuclei of differentiating endoderm cells as revealed by nuclear transplantationThis investigation was supported in part by a research grant from the National Cancer Institute of the National Institutes of Health, United States Public Health Service, and in part by an institutional grant from the American Cancer Society. (1957)

Briggs, Robert ; King, Thomas J.

New York, NY : Wiley-Blackwell

Journal of Morphology 100 (1957), S. 269-311

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URL: http://dx.doi.org/10.1002/jmor.1051000204

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96

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Alterations in the haemocyte population of Drosophila melanogasterSupported in part both by a grant from the Sigma Xi-RESA Research Fund, and by an institutional grant-in-aid from the American Cancer Society, administreted by the Yale University Committee on Atypical Growth. (1957)

Rizki, M. T. M.

New York, NY : Wiley-Blackwell

Journal of Morphology 100 (1957), S. 437-458

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Zusätzliches Material: 28 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1051000303

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97

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Tumor formationin relation to metamorphosis in Drosophila melanogasterSupported by an institutional grant-in-aid from the American Cancer Society, administered by the Yale University Committee on Atypical Growth. (1957)

Rizki, M. T. M.

New York, NY : Wiley-Blackwell

Journal of Morphology 100 (1957), S. 459-472

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URL: http://dx.doi.org/10.1002/jmor.1051000304

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98

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The relation of skin to defect regulation in regenerating half limbsThis investigation has been supported in part by a grant to Brown University from the American Cancer Society, and by a research grant (B-923) from the National Institute of Neurological Diseases and Blindness, of the National Institutes of Health, Public Health Service. (1957)

Goss, Richard J.

New York, NY : Wiley-Blackwell

Journal of Morphology 100 (1957), S. 547-563

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Thema: Biologie , Medizin

Zusätzliches Material: 2 Ill.

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URL: http://dx.doi.org/10.1002/jmor.1051000307

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99

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Initiation of regeneration in regenerates after hypophysectomy in adult triturus viridescensSupported by grant C-2236 from the National Institutes of Health. (1957)

Schotté, Oscar E. ; Hilfer, S. Robert

New York, NY : Wiley-Blackwell

Journal of Morphology 101 (1957), S. 25-55

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Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1051010103

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100

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The role of the apical ridge of ectoderm in the differentiation of the morphological structure and inductive specificity of limb parts in the chickThis investigation was supported by research grants (C-1481, -C1, -C2, -C3, -C4) from the National Cancer Institute of the National Institutes of Health, Public Health Service; by a grant (NSF G2253) from the National Science Foundation; by grants from the American Cancer Society, Milwaukee Division; and by a grant from the Research Fund, University of Okahoma School of Medicine.We are indebted to Mr. Stanislaus Ratajczak for his aid in the preparation of the illustrations, and to Mrs. Lilyan C. Saunders for her assistance in the preparation of the manuscript. (1957)

Saunders, John W. ; Cairns, John M. ; Gasseling, Mary T.

New York, NY : Wiley-Blackwell

Journal of Morphology 101 (1957), S. 57-87

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URL: http://dx.doi.org/10.1002/jmor.1051010104

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