Wonders why the coracoid bone in the flightless Apteryx is so large when the clavicles are reduced. The clavicles are even separate in the ostrich. The large coracoid in reptiles is explained by the connection to the forelimbs.
In no other way can any theory of develop
Letter to Darwin Oct 6. 1860
- f1 2940a.f1The text of the letter has been taken from a copy in Lyell's scientific journal. It is also printed in Wilson ed. 1970, p. 499, though not in the form of a letter. The phrase `Letter to Darwin' has been associated with a following passage discussing Apteryx. Although Lyell had corresponded with CD about Apteryx (letter from Charles Lyell, 30 September 1860, and letter to Charles Lyell, 3 October ), the layout of the text seems to indicate that it was the discussion about `Varieties' rather than that on `Apteryx' that formed the substance of a letter to CD. Moreover, in his letter to Lyell, 8 October , CD refers to Lyell's `case of Red Indian'.
- f2 2940a.f2Lyell refers to the section in C. Lyell 1853 in which he discussed the effects of changes of climate on the distribution of species. Species, he stated, would probably be exterminated before they could adapt to changing circumstances.