[235] Youatt on Sheep, p. 69, where Lord Somerville is quoted. See p. 117, on the presence of wool under the hair. With respect to the fleeces of Australian sheep, p. 185. On selection counteracting any tendency to change, see pp. 70, 117, 120, 168.
[236] Audubon and Bachman, 'The Quadrupeds of North America,' 1846, vol. v. p. 365.
[237] 'Journal of R. Agricult. Soc. of England,' vol. xx., part ii. W. C. Spooner on Cross-Breeding.
[238] 'Philosoph. Transactions,' London, 1813, p. 88.
[239] Isidore Geoffroy St. Hilaire, 'Hist. Nat. Générale,' tom. iii. p. 87. Mr. Blyth ('Land and Water,' 1867, p. 37) has arrived at a similar conclusion, but he thinks that certain Eastern races may perhaps be in part descended from the Asiatic markhor.
[240] Rütimeyer, 'Pfahlbauten,' s. 127.
[241] Godron, 'De l'Espèce,' tom. i. p. 402.
[242] 'Annals and Mag. of Nat. History,' vol. ii. (2nd series), 1848, p. 363.
[243] 'De l'Espèce,' tom. i. p. 406. Mr. Clark also refers to differences in the shape of the mammæ. Godron states that in the Nubian race the scrotum is divided into two lobes; and Mr. Clark gives a ludicrous proof of this fact, for he saw in the Mauritius a male goat of the Muscat breed purchased at a high price for a female in full milk. These differences in the scrotum are probably not due to descent from distinct species; for Mr. Clark states that this part varies much in form.
[244] Mr. Clark, 'Annals and Mag. of Nat. Hist.,' vol. ii. (2nd series), 1848, p. 361.