Geology and PalaeontologySource: The American Naturalist, Vol. 19, No. 2 (Feb., 1885), pp. 163-168Published by: The University of Chicago Press for The American Society of NaturalistsStable URL: http://www.jstor.org/stable/2450040 .
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This content downloaded from 194.29.185.68 on Tue, 20 May 2014 10:25:25 AMAll use subject to JSTOR Terms and Conditions
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This content downloaded from 194.29.185.68 on Tue, 20 May 2014 10:25:25 AMAll use subject to JSTOR Terms and Conditions
This content downloaded from 194.29.185.68 on Tue, 20 May 2014 10:25:25 AMAll use subject to JSTOR Terms and Conditions
This content downloaded from 194.29.185.68 on Tue, 20 May 2014 10:25:25 AMAll use subject to JSTOR Terms and Conditions
This content downloaded from 194.29.185.68 on Tue, 20 May 2014 10:25:25 AMAll use subject to JSTOR Terms and Conditions
This content downloaded from 194.29.185.68 on Tue, 20 May 2014 10:25:25 AMAll use subject to JSTOR Terms and Conditions