[86] ‘Youatt on Sheep,’ p. 312. On same subject, _see_ excellent remarks in ‘Gardener’s Chronicle,’ 1858, p. 868. For experiments in crossing Cheviot sheep with Leicesters _see_ Youatt, p. 325. [87] ‘Youatt on Sheep,’ note, p. 491. [88] M. Malingié-Nouel, ‘Journal R. Agricult. Soc.,’ vol. xiv. 1853, p. 214. Translated and therefore approved by a great authority, Mr. Pusey. [89] ‘The Veterinary,’ vol. x. p. 217. [90] A translation of his paper is given in ‘Bull. Soc. Imp. d’Acclimat.,’ tom. ix., 1862, p. 723. [91] Erman’s ‘Travels in Siberia,’ (Eng. trans.) vol. i. p. 228. For Pallas on the fat-tailed sheep I quote from Anderson’s account of the ‘Sheep of Russia,’ 1794, p. 34. With respect to the Crimean sheep _see_ Pallas’ ‘Travels’ (Eng. trans.) vol. ii. p. 454. For the Karakool sheep _see_ Burnes’ ‘Travels in Bokhara,’ vol. iii. p. 151. [92] _See_ Report of the Directors of the Sierra Leone Company, as quoted in White’s ‘Gradation of Man,’ p. 95. With respect to the change which sheep undergo in the West Indies _ see also_ Dr. Davy, in ‘Edin. New. Phil. Journal,’ Jan. 1852. For the statement made by Roulin, _see_ ‘Mém. de l’Institut présent. par divers Savans,’ tom. vi., 1835, p. 347. [93] ‘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. [94] Audubon and Bachman, ‘The Quadrupeds of North America,’ 1846, vol. v. p. 365. [95] ‘Journal of R. Agricult. Soc. of England,’ vol. xx., part ii., W. C. Spooner on cross-Breeding. [96] ‘Philosoph. Transactions,’ London, 1813, p. 88. [97] 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. [98] Rütimeyer ‘Pfahlbauten,’ s. 127. [99] Godron ‘De l’Espèce,’ tom. i. p. 402. [100] ‘Annals and Mag. of Nat. History,’ vol ii. (2nd series), 1848, p. 363. [101] ‘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. [102] Mr. Clark, ‘Annals and Mag. of Nat. Hist.,’ vol. ii. (2nd series), 1848, p. 361. [103] Desmarest, ‘Encyclop. Méthod. Mammalogie,’ p. 480. [104] ‘Journal of Asiatic Soc. of Bengal,’ vol. xvi., 1847, pp. 1020, 1025. CHAPTER IV. DOMESTIC RABBITS.