The Variation of Animals and Plants Under Domestication, Vol. I.

by Charles Darwin

[155] 'Proc. Zoolog. Soc.,' 1862, p. 13.

[156] 'Journal of Voyages and Travels from 1821 to 1829,' vol. i. p. 300.

[157] Rev. G. Low, 'Fauna Orcadensis,' p. 10. See also Dr. Hibbert's account of the pig of the Shetland Islands.

[158] 'Die Racen des Schweines,' s. 70.

[159] These woodcuts are copied from engravings given in Mr. S. Sidney's excellent edition of 'The Pig,' by Youatt, 1860. See pp. 1, 16, 19.

[160] 'Schweineschädel,' s. 74, 135.

[161] Nathusius, 'Die Racen des Schweines,' s. 71.

[162] 'Die Racen des Schweines,' s. 47. 'Schweineschädel,' s. 104. Compare, also, the figures of the old Irish and the improved Irish breeds in Richardson on 'The Pig,' 1847.

[163] Quoted by Isid. Geoffroy, 'Hist. Nat. Gén.,' tom. iii. p. 441.

[164] S. Sidney, 'The Pig,' p. 61.