Supplement to: Waldbusser, George G; Gray, Matthew W; Hales, Burke; Langdon, Chris; Haley, Brian A; Gimenez, Iria; Smith, Stephanie R; Brunner, Elizabeth L; Hutchinson, Greg (2016): Slow shell building, a possible trait for resistance to the effects of acute ocean acidification. Limnology and Oceanography, 61(6), 1969-1983, https://doi.org/10.1002/lno.10348