RECORD: Darwin, C. R. n.d. Abstract of Haldeman, Enumeration of recent freshwater Mollusca, etc. CUL-DAR16.300. Edited by John van Wyhe (The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 8.2023. 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-DAR16 contains calculations and tables for Darwin's 'big book' Natural Selection F1583.
The brown crayon number '5' indicates that this document was filed by Darwin in his portfolio Origin chap. 5 laws of variation.
Haldeman S. S. 1843-1844. Enumeration of recent freshwater Mollusca which are common to North America and Europe; with observations on species and their distribution. Journal of Natural History (Boston) 4: 468-84.
[300]
p. 474.— quotes Westwood. (Introduct to Entomol:?)
Boston Journ. Nat. Hist Vol. 4.
(3) 5
In very extensive genera, the distinctions of species are so minute, that it requires the most practised eye to separate them"; & indeed there are some groups the species of which are so intricately blended together, that no two entomologists are agreed as to their distinctness."
(Q)
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 7 September, 2023