The Variation of Animals and Plants Under Domestication, Vol. I.

by Charles Darwin

[483] W. Kidd's 'Treatise on Song-Birds,' p. 18.

[484] The 'Indian Field,' 1858, p. 255.

[485] Yarrell's 'British Fishes,' vol. i, p. 319.

[486] Mr. Blyth, in the 'Indian Field,' 1858, p. 255.

[487] 'Proc. Zoolog. Soc.,' May 25th. 1842.

[488] Yarrell's 'British Fishes,' vol. i. p. 319.

[489] 'Dict. Class. d'Hist. Nat.,' tom. v. p. 276.

[490] 'Observations in Nat. Hist.,' 1846, p. 211. Dr. Gray has described, in 'Annals and Mag. of Nat. Hist.,' 1860, p. 151, a nearly similar variety, but destitute of a dorsal fin.

[491] 'De l'Espèce,' 1859, p. 459. With respect to the bees of Burgundy, see M. Gérard, art. 'Espèce,' in 'Dict. Univers. d'Hist. Nat.'

[492] See a discussion on this subject, in answer to a question of mine, in 'Journal of Horticulture,' 1862, pp. 225-242; also Mr. Bevan Fox, in ditto, 1862, p. 284.