The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. n.d. What is musculus sternalis. CUL-DAR80.B19-B20. Edited by John van Wyhe (The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

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 volumes CUL-DAR80-86 contain material for Darwin's book Descent of man (1871).

B19

(6) What is musculus sternalis? is it same as Sternalis Brutorum (yes) — Turner says occurs in 3/100 — what is its action.— It is a supplicate muscle (& distinct from Platysema pyrides. (Ch. 3) (or Ch I?)

(Huxley)

B20

(4) Lungs in early embryo do they seem to consist of 4 Lobes, & can these persistent traces of such structures? I have seen notices of 3 lobes in adult state.— (Omit)

Aug: Müller

(5) The heart in earliest embryonic condition is it a single vessel or tube— It is a single tube which becomes bulb

Huxley Ch. I.

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