RECORD: Darwin, C. R. 1857.04. Ch 6 / As Hooker insisted so much about intermediate not being f[ound]. CUL-DAR47.7. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 7.2022. 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-DAR47 contains notes for Natural selection chap. 7 'Laws of Variation'.


[7]

Ch. 6 Ap 57.

as Hooker insisted so much about intermediates not being f. makes this part clear, which I think it is not.—

(1) If whole body whether small or many changes, if small spreading afterwards & the very change implies extinction of the steps.) either in one locality or 1/2 isolated dozens, then evidence can be f. only geologically — depends on — &c.— (a)

2) If species changes over wide area intermediates in intermediate zone, & ∴ case as explained & apt to be extinguished.

(3) If animals body species changes mingled up with [illeg] parent forms conditions will be chiefly often organic, & so not no intermediate blending climatal stations.—

But hopeless to discuss subject in detail from not knowing origin of such intermediate vars. as do exist

[7v]

(a)

The species to existing before modifications, generally in the 1/2 dozen areas implies generally a continuous area since broken up, this breaking up wd destroy intermediate forms if they then existed. A stray colonist wd get suddenly into new conditions


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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 28 August, 2023