in 'Indian Sporting Review,' 1856, p. 320; and
Col. Hamilton Smith, in 'Nat. Library, Horses,' p. 318; and 'Dict. Class.
d'Hist. Nat.,' tom. iii. p. 563.

[102] Figured in the 'Gleanings from the Knowsley Menageries,' by Dr. J. E.
Gray.

[103] Cases of both Spanish and Polish hens sitting are given in the
'Poultry Chronicle,' 1855, vol. iii. p. 477.

[104] 'The Poultry Book,' by Mr. Tegetmeier, 1866, pp. 119, 163. The
author, who remarks on the two negatives ('Journ. of Hort.,' 1862, p. 325),
states that two broods were raised from a Spanish cock and Silver-pencilled
Hamburgh hen, neither of which are incubators, and no less than seven out
of eight hens in these two broods "showed a perfect obstinacy in sitting."
The Rev. E. S. Dixon ('Ornamental Poultry,' 1848, p. 200) says that
chickens reared from a cross between Golden and Black Polish fowls, are
"good and steady birds to sit." Mr. B. P. Brent informs me that he raised
some good sitting hens by crossing Pencilled Hamburgh and Polish breeds. A
cross-bred bird from a Spanish non-incubating cock and Cochin incubating
hen is mentioned in the 'Poultry Chronicle,' vol. iii. p. 13, as an
"exemplary mother." On the other hand, an exceptional case is given in the
'Cottage Gardener,' 1860, p. 388, of a hen raised from a Spanish cock and
black Polish hen which did not incubate.

[105] 'The Poultry Book,' by Tegetmeier, 1866, pp. 165, 167.

[106] 'Natural History Review,' 1863, April, p. 277.

[107] 'Essays on Natural History,' p. 197.

[108] As stated by Mr. Orton, in his 'Physiology of Breeding,' p. 12.

[109] M. E. de Selys-Longchamps refers ('Bulletin Acad. Roy. de Bruxelles,'
tom. xii. No. 10) to more than seven of these hybrids shot in Switzerland
and France. M. Deby asserts ('Zoologist,' vol. v., 1845-46, p. 1254) that
several have been shot in various parts of Belgium and Northern France.
Audubon ('Ornitholog. Biography,' vol. iii. p. 168), speaking of these
hybrids, says that, in North America, they "now and then wander off and
become quite wild."

[110] 'Journal of Researches,' 1845, p. 71.

[111] 'Expedition to the Zambesi,' 1865, pp. 25, 150.

[112] Dr. P. Broca, on 'Hybridity in the Genus Homo,' Eng. translat., 1864,
p. 39.

[113] 'Nouvelles Archives du Museum,' tom. i. p. 151.

[114] 'Bastarderzeugung,' s. 582, 438, &c.

[115] 'Die Bastardbefruchtung ... der Weiden,' 1865, s. 23. For Gaertner's
remarks on this head, _see_ 'Bastarderzeugung,' s. 474