[35] Azara, ‘Voyages dans l’Amér. Mérid.’ tom. i. p. 381; his account is fully confirmed by Rengger. Quatrefages gives an account of a bitch brought from Jerusalem to France which burrowed a hole and littered in it. See ‘Discours, Exposition des Races Canines,’ 1865, p. 3.
[36] With respect to wolves burrowing holes see Richardson, ‘Fauna Boreali-Americana,’ p. 64; and Bechstein ‘Naturgeschichte Deutschlands,’ B. i. s. 617.
[37] See Poeppig, ‘Reise in Chile,’ B. i. s. 290; Mr. G. Clarke, as above; and Rengger, s. 155.
[38] Dogs, ‘Nat. Library,’ vol. x. p. 121; an endemic South American dog seems also to have become feral in this island. See Gosse’s ‘Jamaica,’ p. 340.
[39] Low ‘Domesticated Animals,’ p. 650.
[40] ‘The Naturalist Library,’ Dogs, vol. x. pp. 4, 19.
[41] Quoted by Prof. Gervais, ‘Hist. Nat. Mamm.,’ tom. ii. p. 66.
[42] J. Hunter shows that the long period of seventy-three days given by Buffon is easily explained by the bitch having received the dog many times during a period of sixteen days (‘Phil. Transact.,’ 1787, p. 353). Hunter found that the gestation of a mongrel from wolf and dog (‘Phil. Transact.,’ 1789, p. 160) apparently was sixty-three days, for she received the dog more than once. The period of a mongrel dog and jackal was fifty-nine days. Fred. Cuvier found the period of gestation of the wolf to be (‘Dict. Class. d’Hist. Nat.’ tom. iv. p. 8) two months and a few days, which agrees with the dog. Isid G. St.-Hilaire, who has discussed the whole subject, and from whom I quote Bellingeri, states (‘Hist. Nat. Gén.,’ tom. iii. p. 112) that in the Jardin des Plantes the period of the jackal has been found to be from sixty to sixty-three days, exactly as with the dog.
[43] See Isid. Geoffroy St.-Hilaire ‘Hist. Nat. Gén.,’ tom. iii. p. 112, on the odour of jackals. Col. Ham. Smith in ‘Nat. Lib.,’ vol. x. p. 289.
[44] Quoted by Quatrefages in ‘Bull. Soc. d’Acclimat.,’ May 11th, 1863.