[145] Nathusius, 'Die Racen des Schweines,' Berlin, 1860. An excellent appendix is given with references to published and trustworthy drawings of the breeds of each country.
[146] For Europe, see Bechstein, 'Naturgesch. Deutschlands,' 1801, b. i., s. 505. Several accounts have been published on the fertility of the offspring from wild and tame swine. See Burdach's 'Physiology,' and Godron, 'De l'Espèce,' tom. i. p. 370. For Africa, 'Bull. de la Soc. d'Acclimat.,' tom. iv. p. 389. For India, see Nathusius, 'Schweineschädel,' s. 148.
[147] Sir W. Elliot, Catalogue of Mammalia, 'Madras Journal of Lit. and Science,' vol. x. p. 219.
[148] 'Pfahlbauten,' s. 163 et passim.
[149] See Rütimeyer's Neue Beitrage, ... Torfschweine, Verh. Naturfor. Gesell. in Basel, iv. i., 1865, s. 139.
[150] Stan. Julien, quoted by De Blainville, 'Ostéographie,' p. 163.
[151] Richardson, 'Pigs, their Origin,' &c., p. 26.
[152] 'Die Racen des Schweines,' s. 47, 64.
[153] 'Proc. Zoolog. Soc.,' 1861, p. 263.
[154] Sclater, in 'Proc. Zoolog. Soc.,' Feb. 26th, 1861.