Des Varietes,' 1865, p. 72.

[828] 'Arbres Fruitiers,' 1836, tom. ii. pp. 204, 226.

[829] 'Annales du Museum,' tom. xx. p. 188.

[830] 'Gardener's Chron.,' 1843, p. 877.

[831] Ibid., 1845, p. 102.

[832] 'Hist. des Anomalies,' tom. iii. p. 402. _See_ also M. Camille
Dareste, 'Recherches sur les Conditions,' &c., 1863, pp. 16, 48.

[833] Rev. E. S. Dixon, 'Ornamental Poultry,' 1848, p. 111; Isidore
Geoffroy, 'Hist. Anomalies,' tom. i. p. 211.

[834] 'On the Breeding of Domestic Animals,' 1829, p. 6.

[835] Youatt on Cattle, 1834, p. 283.

[836] Mr. Herbert Spencer ('Principles of Biology,' 1864, vol. i. pp. 452,
468) takes a different view; and in one place remarks: "We have seen reason
to think that, as fast as essential faculties multiply, and as fast as the
number of organs that co-operate in any given function increases, indirect
equilibration through natural selection becomes less and less capable of
producing specific adaptations; and remains fully capable only of
maintaining the general fitness of constitution to conditions." This view
that natural selection can do little in modifying the higher animals
surprises me, seeing that man's selection has undoubtedly effected much
with our domesticated quadrupeds and birds.

[837] Dr. Prosper Lucas apparently disbelieves in any such connexion,
'L'Hered. Nat.,' tom. ii. pp. 88-94.

[838] 'British Medical Journal,' 1862, p. 433.

[839] Boudin, 'Geograph. Medicale,' tom. i. p. 406.

[840] This fact and the following cases, when not stated to the contrary,
are taken from a very curious paper by Prof. Heusinger, in 'Wochenschrift
fuer Heilkunde,' May 1846, s. 277.

[841] Mr. Mogford, in the 'Veterinarian,' quoted in 'The Field,' Jan. 22,
1861, p. 545.

[842] 'Edinburgh Veterinary Journal,' Oct. 1860, p. 347.

[843] 'Hist. des Anomalies,' 1832, tom. i. pp. 22, 537-556; tom. iii. p.
462.

[844] 'Comptes Rendus,' 1855, pp. 855, 1029.

[845] Carpenter's 'Comp. Phys.,' 1854, p. 480; _see_ also Camille Dareste,
'Comptes Rendus,' March 20th, 1865, p. 562.

[846] 'Elements of Physiology,' Eng. translat, vol. i., 1838, p. 412. With
respect to Vrolik, _see_ Todd's 'Cyclop. of Anat. and Phys.,' vol. iv.,
1849-52, p. 973.

[847] 'Teratologie Veg.,' 1841, livre iii.

[848] 'Hist. des Anomalies,' tom. iii. pp. 4, 5, 6.

[849] 'Teratologie Veg.,' p. 156. _See_ also my paper on climbing plants in
'Journal of Linn. Soc. Bot.,' vol. ix., 1865, p. 114.

[850] 'Mem