[55] F. Cuvier in ‘Annales du Muséum,’ tom. xviii. p. 337; Godron ‘De l’Espèce,’ tom. i. p. 342; and Col. H. Smith in ‘Nat. Library,’ vol. ix. p. 101. _See also_ some observations on the degeneracy of the skull in certain breeds, by Prof. Bianconi, ‘La Theorie Darwinienne,’ 1874, p. 279. [56] Dr. Burt Wilder, ‘American Assoc. Advancement of Science,’ 1873, pp. 236, 239. [57] Isid. Geoffroy Saint-Hilaire ‘Hist. des Anomalies,’ 1832, tom. i. p. 660, Gervais ‘Hist. Nat. des Mammifères,’ tom. ii., 1855, p. 66. De Blainville (‘Ostéographie, Canidæ,’ p. 137) has also seen an extra molar on both sides. [58] ‘Ostéographie, Canidæ,’ p. 137. [59] Würzburger ‘Medecin. Zeitschrift,’ 1860, B. i. s. 265. [60] Mr. Yarrell in ‘Proc. Zoolog. Soc.,’ Oct. 8th, 1833. Mr. Waterhouse showed me a skull of one of these dogs, which had only a single molar on each side and some imperfect incisors. [61] Quoted in ‘The Veterinary,’ London, vol. viii. p. 415. [62] This is quoted from Stonehenge, a great authority, ‘The Dog,’ 1867, p. 187. [63] ‘Hist. Nat. Général,’ tom. iii. p. 448. [64] W. Scrope ‘Art of Deer-Stalking,’ p. 354. [65] Quoted by Col. Ham. Smith in ‘Nat. Lib.,’ vol. x. p. 79. [66] De Blainville ‘Ostéographie, Canidæ,’ p. 134. F. Cuvier ‘Annales du Muséum,’ tom. xviii. p. 342. In regard to mastiffs, _see_ Col. H. Smith ‘Nat. Lib.’ vol. x. p. 218. For the Thibet mastiff, _see_ Mr. Hodgson in ‘Journal of As. Soc. of Bengal,’ vol. i., 1832, p. 342. [67] ‘The Dog,’ 1845, p. 186. With respect to diseases Youatt asserts (p. 167) that the Italian greyhound is “strongly subject” to polypi in the matrix or vagina. The spaniel and pug (p. 182) are most liable to bronchocele. The liability to distemper (p. 232) is extremely different in different breeds. On the distemper, _see also_ Col. Hutchinson on ‘Dog Breaking,’ 1850, p. 279. [68] _See_ Youatt on the Dog, p. 15; ‘The Veterinary,’ London, vol. xi. p. 235. [69] ‘Journal of As. Soc. of Bengal,’ vol. iii. p. 19. [70] ‘Travels,’ vol. ii. p. 15. [71] Hodgson in ‘Journal of As. Soc. of Bengal,’ vol. i. p. 342. [72] ‘Field Sports of the North of Europe,’ vol. ii. p. 165. [73] ‘Hist. Nat. des Mammif.,’ 1855, tom. ii. pp. 66, 67. [74] ‘History of Quadrupeds,’ 1793, vol. i. p. 238. [75] ‘Oriental Field Sports,’ quoted by Youatt, ‘The Dog,’ p. 15. [76] A. Murray gives this passage in his ‘Geographical Distribution of Mammals,’ 4to, 1866, p. 8. [77] Quoted by Mr. Galton, ‘Domestication of Animals,’ p. 13. [78] ‘Hist. Nat. Gén.,’ tom. iii. p. 450. [79] Mr. Greenhow on the Canadian Dog in Loudon’s ‘Mag. of Nat. Hist.,’ vol. vi., 1833, p. 511. [80] _See_ Mr. C. O. Groom-Napier on the webbing of the hind feet of Otterhounds in ‘Land and Water,’ Oct. 13, 1866, p. 270. [81] ‘Fauna Boreali-Americana,’ 1829, p. 62. [82] ‘The Horse in all his Varieties,’ etc., 1829, pp. 230, 234.