RECORD: Darwin, C. R. [1870-1871]. Draft of Descent 2: 34. CUL-DAR110.B21r. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 1.2023. RN1
NOTE: Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volumes CUL-DAR108-111 contain material for Darwin's book Forms of flowers (1877). See record in the Darwin Online manuscript catalogue, enter its Identifier here.
Draft is in the hand of Ebenezer Norman with corrections by Darwin. The text of the draft corresponds to Descent 2, p. 34.
[21r]
differences characteristic of of the sexes of certain lizards. The male of Ceratophora aspera has bears on the extremity of the his snout an appendage half as long as the head. It is cylindrical, covered with scales, flexible, and apparently capable of erection: In in the female it is quite rudimental.
In a second species of the same genus a terminal scale of the appendage forms a minute horn; and in a third species (Fig. 34.) (C. Stoddartii, fig.) the whole appendage is converted into a horn, which is usually of a white colour, but assumes a purplish tint when the animal is excited. In the adult male of this latter species the horn It is half an inch in length, but only butonly less thanhalf this size in the female, and still smaller in the young.
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 28 April, 2023