characters of different breeds of, discussed, i. 34-37;
degeneration of European, in warm climates, i. 36, 38; ii. [278], [305];
liability to certain diseases in different breeds of, i. 36 and note;
causes of differences of breeds discussed, i. 37-43;
catching fish and crabs in New Guinea and Tierra del Fuego, i. 39;
webbing of the feet in, i. 39;
influence of selection in producing different breeds of, i. 39, 43;
retention of original habits by, i. 182;
inheritance of polydactylism in, ii. [14];
feral, ii. [33];