Abstract
THE use of optical projection in certain screw-gauges1 and pivot-wear meters2 suggested methods for examining the kind and degree of variation shown by plane spiral coiling in a group of small and well-preserved lamellibranchs (Gryphœa incurva (Sow.)) when researches upon these variations were extended3 in this Department recently. Identical methods proved applicable to the study of small ammonites and other shells, whether fossil or recent, provided they were coiled in a plane spiral.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
DOLLAR, A. Optical Projection as an Aid in Studying Plane Spiral Coiling of Small Fossil Lamellibranchs. Nature 150, 57–58 (1942). https://doi.org/10.1038/150057b0
Issue Date:
DOI: https://doi.org/10.1038/150057b0
This article is cited by
-
Tracing Plane Spiral Coiling
Nature (1942)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.