[737] Nathusius, 'Die Racen des Schweines,' 1860, s. 53, 57; 'Vorstudien ... Schweineschædel,' 1864, s. 103, 130, 133.
[738] 'Journal of Agriculture of Highland Soc.,' July, 1860, p. 321.
[739] 'Principles of Biology,' vol. ii. p. 263.
[740] 'Natural History Review,' vol. iv., Oct. 1864, p. 617.
[741] 'Lectures on Surgical Pathology,' 1853, vol. i. p. 27.
[742] Andersson, 'Travels in South Africa,' p. 318. For analogous cases in South America, see Aug. St. Hilaire, 'Voyage dans le Province de Goyaz,' tom. i. p. 71.
[743] Brickell's 'Nat. Hist. of North Carolina,' 1739, p. 53.
[744] Livingstone, quoted by Youatt on Sheep, p. 142. Hodgson, in 'Journal of Asiatic Soc. of Bengal,' vol. xvi., 1847, p. 1006, &c. &c.
[745] 'Naturalist Library,' Dogs, vol. ii. 1840, p. 104.
[746] 'De l'Espèce,' tom. i., 1859, p. 367.