RECORD: Darwin, C. R. [early draft titleof Origin] On the mutability of species [& other notes] CUL-DAR205.1.70 Transcribed by Kees Rookmaaker, edited by John van Wyhe (Darwin Online,

REVISION HISTORY: Transcribed by Kees Rookmaaker, edited by John van Wyhe 09.2014. RN1


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Reproduced with the permission of the Syndics of Cambridge University Library and William Huxley Darwin.


On the
Mutability of Species



C. Darwin, M. A, F.R.S.

John Murray. 1860!!


"Nascent" wd be good term applied to organs in contradistinction to "rudimentary" "aborted" — How hard to say, though utility forms the clear criterion which is nascent & which rudimentary, though we can say positively that some many parts are rudimentary — are penguins paddles

70 verso

Penguins wings possibly may be nascent — Steamer Duck (judging from affinity to other) & Apteryx certainly rudimentary. —

Swim bladder of Ameiva a nascent organ

nascent or rudimentary. —

We can perceive, that though in the formation of wings, all gradations may & must be useful to individuals (as we now see in penguins, steamers &c) yet that when wing once a flying organ, the numbers of species in this type wd immensely increase & so extinguish, numbers of animals in other types.

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Citation: John van Wyhe, editor. 2002-. The Complete Work of Charles Darwin Online. (

File last updated 10 October, 2014