variations in the colour of the croup in pigeons, i. 184;
on the German dove-cot pigeon, i. 185;
fertility of mongrel pigeons, i. 192;
on hybrid turtle-doves, i. 193;
on crossing the pigeon with Columba œnas, C. palumbus, Turtur risoria, and T. vulgaris, i. 193;
development of spurs in the silk-hen, i. 256;
on Polish fowls, i. 257, 264;
on crested birds, i. 257;
on the Canary-bird, i. 295, ii. [22], [161];
German superstition about the turkey, i. 293;