_see_ P. Lucas, 'Hered. Nat.,' tom. i. p. 212.

[197] 'Internat. Hort. and Bot. Congress of London,' 1866.

[198] 'Bastarderzeugung,' s. 307. Koelreuter ('Dritte Fortsetszung,' s. 34,
39), however, obtained intermediate tints from similar crosses in the genus
Verbascum. With respect to the turnips, _see_ Herbert's 'Amaryllidaceae,'
1837, p. 370.

[199] 'Nouvelles Archives du Museum,' tom. i. p. 100.

[200] Richardson, 'Pigs,' 1847, pp. 37, 42; S. Sidney's edition of 'Youatt
on the Pig,' 1860, p. 3.

[201] _See_ Mr. W. C. Spooner's excellent paper on Cross-Breeding, 'Journal
Royal Agricult. Soc.,' vol. xx., part ii.: _see_ also an equally good
article by Mr. Ch. Howard, in 'Gardener's Chronicle,' 1860, p. 320.

[202] 'Gardener's Chronicle,' 1857, pp. 649, 652.

[203] 'Bulletin de la Soc. d'Acclimat.,' 1862, tom. ix. p. 463. _See_ also,
for other cases, MM. Moll and Gayot, 'Du Boeuf,' 1860, p. xxxii.

[204] 'Poultry Chronicle,' vol. ii., 1854, p. 36.

[205] 'The Poultry Book,' by W. B. Tegetmeier, 1866, p. 58.

[206] 'Gardener's Chronicle,' 1852, p. 765.

[207] Spooner, in 'Journal Royal Agricult. Soc.,' vol. xx., part ii.

[208] _See_ Colin's 'Traite de Phys. Comp. des Animaux Domestiques,' tom.
ii. p. 536, where this subject is well treated.

[209] 'Les Pigeons,' p. 37.

[210] Vol. i., 1854, p. 101.

[211] 'Cottage Gardener,' 1856, p. 110.

[212] 'Bastarderzeugung,' s. 553.

[213] Dr. Pigeaux, in 'Bull. Soc. d'Acclimat.,' tom. iii., July 1866, as
quoted in 'Annals and Mag. of Nat. Hist.,' 1867, vol. xx. p. 75.

[214] 'Journal de Physiolog.,' tom. ii., 1859, p. 385.

[215] Dec. 1863, p. 484.

[216] On the Varieties of Wheat, p. 66.

[217] Rengger, 'Saeugethiere von Paraguay,' s. 336.

[218] _See_ a memoir by MM. Lherbette and De Quatrefages, in 'Bull. Soc.
d'Acclimat.,' tom. viii., July, 1861, p. 312.

[219] For the Norfolk sheep, _see_ Marshall's 'Rural Economy of Norfolk,'
vol. ii. p. 133. _See_ Rev. L. Landt's 'Description of Faroe,' p. 66. For
the ancon sheep, _see_ 'Phil. Transact.,' 1813, p. 90.

[220] White's 'Nat. Hist. of Selbourne,' edited by Bennett, p. 39. With
respect to the origin of the dark-coloured deer, _see_ 'Some Account of
English Deer Parks,' by E. P. Shirley, Esq.

[221] 'The Dovecote,' by the Rev. E. S. Dixon, p. 155; Bechstein,
'Naturgesch. Deutschlands,' Band iv., 1795, s. 17.

[222] 'Cattle,' p. 202.

[223] Mr. J. Wilkinson, in 'Remarks addressed to Sir J. Sebrig