[17] Duval Jouve, ‘Bull. Soc. Bot. de France,’ tom. x., 1863, p. 194. With respect to the perfect flowers setting seed, see Dr. Ascherson in ‘Bot. Zeitung,’ 1864, p. 350.
[18] Extract of a letter from Sir R. Heron, 1838, given me by Mr. Yarrell. With respect to mice, see ‘Annal. des Sc. Nat.,’ tom. i. p. 180; and I have heard of other similar cases. For turtle-doves Boitard and Corbié, ‘Les Pigeons,’ etc., p. 238. For the Game fowl, ‘The Poultry Book,’ 1866, p. 128. For crosses of tailless fowls see Bechstein, ‘Naturges. Deutsch.’ b. iii. s. 403. Bronn, ‘Geschichte der Natur,’ b. ii. s. 170, gives analogous facts with horses. On the hairless condition of crossed South American dogs, see Rengger, ‘Säugethiere von Paraguay,’ s. 152; but I saw in the Zoological Gardens mongrels, from a similar cross, which were hairless, quite hairy, or hairy in patches, that is, piebald with hair. For crosses of Dorking and other fowls, see ‘Poultry Chronicle,’ vol. ii. p. 355. About the crossed pigs, extract of letter from Sir R. Heron to Mr. Yarrell. For other cases, see P. Lucas ‘L’Héréd. Nat.’ tom. i. p. 212.
[19] ‘Internat. Hort. and Bot. Congress of London,’ 1866.
[20] ‘Bastarderzeugung,’ s. 307. Kölreuter (‘Dritte Fortsetszung,’ s. 34, 39), however, obtained intermediate tints from similar crosses in the genus Verbascum. With respect to the turnips, see Herbert’s ‘Amaryllidaceæ,’ 1837, p. 370.
[21] ‘Nouvelles Archives du Muséum,’ tom. i. p. 100.
[22] Richardson, ‘Pigs,’ 1847, pp. 37, 42; S. Sidney’s edition of ‘Youatt on the Pig,’ 1860, p. 3.
[23[] 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.
[24] ‘Gardener’s Chronicle,’ 1857, pp. 649, 652.
[25] ‘Bulletin de la Soc. d’Acclimat.,’ 1862, tom. ix. p. 463. See also for other cases MM. Moll and Gayot, ‘Du Bœuf,’ 1860, p. 32.
[26] ‘Poultry Chronicle,’ vol. ii., 1854, p. 36.