, on the authority of Dr. H.
Stewart, in 'Med.-Chirurg. Review,' April, 1863, pp. 449, 477.

[179] 'Hered. Nat.,' tom. ii. p. 852.

[180] Communications to the Board of Agriculture, vol. i. p. 367.

[181] 'Review of Reports, North of England,' 1808, p. 200.

[182] 'Saeugethiere von Paraguay,' 1830, s. 212.

[183] Rengger, 'Saeugethiere,' &c., s. 154.

[184] White, 'Regular Gradation in Man,' p. 146.

[185] Dr. W. F. Edwards, in his 'Characteres Physiolog. des Races
Humaines,' p. 23, first called attention to this subject, and ably
discussed it.

[186] Rev. D. Tyerman, and Bennett, 'Journal of Voyages,' 1821-1829, vol.
i. p. 300.

[187] Mr. S. J. Salter, 'Journal Linn. Soc.,' vol. vi., 1862, p. 71.

[188] Sturm, 'Ueber Racen, &c.,' 1825, s. 107. Bronn, 'Geschichte der
Natur.,' b. ii. s. 170, gives a table of the proportions of blood after
successive crosses. Dr. P. Lucas, 'l'Heredite Nat.,' tom. ii. p. 308.

[189] 'Bastarderzeugung,' s. 463, 470.

[190] 'Nova Acta Petrop.,' 1794, p. 393: _see_ also previous volume.

[191] As quoted in the 'True Principles of Breeding,' by C. H. Macknight
and Dr. H. Madden, 1865, p. 11.

[192] With respect to plants, an admirable essay on this subject (Die
Geschlechter-Vertheilung bei den Pflanzen: 1867) has lately been published
by Dr. Hildebrand, who arrives at the same general conclusions as I have
done.

[193] 'Teoria della Riproduzione Vegetal,' 1816, p. 12.

[194] Verlot, 'Des Varietes,' 1865, p. 72.

[195] Duval-Jouve, 'Bull. Soc. Bot. de France,' tom. x., 1863, p. 194.

[196] 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 Corbie,
'Les Pigeons,' &c., 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, 'Saeugethiere 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,