RECORD: Darwin, C. R. 1854.11. When we see in same class, water-shells different & land-shells similar. CUL-DAR205.2.110. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 5.2022. RN1
NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volume CUL-DAR205.2 contains notes on means of distribution.
[110]
Nov. 54.
When we see in same class, water-shells different & land-shells similar on two sides of Alleghenies, with country so similar — when we see shells so different on each side of isthmus of Panama, with sea so similar,— we are impressed with idea of creation single on each side.— So in time, the number of genera descended from Silurian to present times, shows no great difference, yet same species not reappeared.
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 25 September, 2022