1, p. 76.

[291] _See_ the account of the House-tumblers kept at Glasgow, in the
'Cottage Gardener,' 1858, p. 285. Also Mr. Brent's paper, 'Journal of
Horticulture,' 1861, p. 76.

[292] J. M. Eaton's 'Treatise on Pigeons,' 1852, p. 9.

[293] J. M. Eaton's Treatise, edit. 1858, p. 76.

[294] Neumeister,'Taubenzucht,' Tab. 4, fig. i.

[295] Riedel, 'Die Taubenzucht,' 1824, s. 26. Bechstein, 'Naturgeschichte
Deutschlands,' Band iv. s. 36, 1795.

[296] Willoughby's 'Ornithology,' edited by Ray.

[297] J. M. Eaton's edition (1858) of Moore, p. 98.

[298] Pigeon Patu Plongeur. 'Les Pigeons,' &c., p. 165.

[299] 'Naturgesch. Deutschlands,' Band iv. s. 47.

[300] Mr. W. B. Tegetmeier, 'Journal of Horticulture,' Jan. 20th, 1863, p.
58.

[301] 'Coup-d'oeil sur l'Ordre des Pigeons,' par C. L. Bonaparte; Comptes
Rendus, 1854-55. Mr. Blyth, in 'Annals of Nat. Hist.,' vol. xix., 1847, p.
41, mentions, as a very singular fact, "that of the two species of
Ectopistes, which are nearly allied to each other, one should have fourteen
tail-feathers, while the other, the passenger pigeon of North America,
should possess but the usual number--twelve."

[302] Described and figured in the 'Poultry Chronicle,' vol. iii., 1855, p.
82.

[303] 'The Pigeon Book,' by Mr. B. P. Brent, 1859, p. 41.

[304] 'Die Staarhaelsige Taube, Das Ganze, &c.,' s. 21, tab. i. fig. 4.

[305] 'A Treatise on the Almond Tumbler,' by J. M. Eaton, 1852, p. 8, et
passim.

[306] A Treatise, &c, p. 10.

[307] Boitard and Corbie, 'Les Pigeons,' &c. 1824, p. 173.

[308] 'Le Pigeon Voyageur Belge,' 1865, p. 87.

[309] Prof. A. Newton ('Proc. Zoolog. Soc.' 1865, p. 716) remarks that he
knows no species which presents any remarkable sexual distinction; but it
is stated ('Naturalist's Library, Birds,' vol. ix. p. 117) that the
excrescence at the base of the beak in the _Carpophaga oceanica_ is sexual:
this, if correct, is an interesting point of analogy with the male Carrier,
which has the wattle at the base of its beak so much more developed than in
the female. Mr. Wallace informs me that in the sub-family of the Treronidae
the sexes often differ in vividness of colour.

[310] I am not sure that I have designated the different kinds of vertebrae
correctly: but I observe that different anatomists follow in this respect
different rules, and, as I use the same terms in the comparison of all the
skeletons, this, I hope, will not signify.

[311] J. M. Eaton's