Biometrika Trust Quantitative Study of the Effect of Environment upon the Forms of Nassa Obsoleta and Nassa Trivittata from Cold Spring Harbor, Long Island Author(s): Abigail Camp Dimon Source: Biometrika, Vol. 2, No. 1 (Nov., 1902), pp. 24-43 Published by: Biometrika Trust Stable URL: http://www.jstor.org/stable/2331499 . Accessed: 19/06/2014 23:24 Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at . http://www.jstor.org/page/info/about/policies/terms.jsp . JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact
[email protected]. Biometrika Trust is collaborating with JSTOR to digitize, preserve and extend access to Biometrika. http://www.jstor.org This content downloaded from 185.2.32.21 on Thu, 19 Jun 2014 23:24:33 PM All use subject to JSTOR Terms and Conditions QUANTITATIVE STUDY OF THE EFFECT OF ENVIRON- MENT UPON THE FORMS OF NASSA OBSOLETA AND NASSA TRIVITTATA FROM COLD SPRING HARBOR, LONG ISLAND. BY ABIGAIL CAMP DIMON. (1) Introductory. The aims of this paper are to make a quantitativeinquiry into the effectof diverseenvironmental conditions upon the formof two gastropod species,Nassa obsoletaand Nassa trivittata,from Cold Spring Harbor,Long Island, and also to record the characteristicsof their shells and thus to determinethe " place mode" for these shells in that locality.