RECORD: Darwin, C. R. 1856.04. [Note on bird migration and then crossing breeds]. CUL-DAR50.D21. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and John van Wyhe 3.2021. 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.

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[21]

Apr. 56 [April 1856]

I think it possible that in small islds as Madeira a chance arrival of Bird from crossing the Breed, its offspring might have some advantage over the orig genus.

The apparent frequency of [illeg] owing perhaps, to get N. & S line of migration or adjoining continent.

Contrast Land & Sea shells

See MacAndrews list

1v

I have never met any one who doubted that there was close relation between geographical distribution & systemic affinity, if so how paradoxical that between nearest affinity of individuals of same species, then shd not be geographical juxtaposition

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Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)

File last updated 25 September, 2022