' vol. ii. p. 136.

[229] 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.

[230] Youatt on Sheep, note, p. 491.

[231] 'The Veterinary,' vol. x. p. 217.

[232] A translation of his paper is given in 'Bull. Soc. Imp. d'Acclimat.,'
tom. ix., 1862, p. 723.

[233] 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.

[234] _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_ 'Mem. de
l'Institut present. par divers Savans,' tom. vi., 1835, p. 347.

[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. Generale,' 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] Ruetimeyer, 'Pfahlbauten,' s. 127.

[241] Godron, 'De l'Espece,' tom. i. p. 402.

[242] 'Annals and Mag. of Nat. History,' vol. ii. (2nd series), 1848, p.
363.

[243] 'De l'Espece,' tom. i. p. 406. Mr. Clark also refers to differences
in the shape of the mammae. 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