248;
chickens, i. 249-250;
late development of the tail in Cochin cocks, i. 250;
comb of lark-crested fowls, i. 256;
development of webs in Polish fowls, i. 259;
on the voice of fowls, i. 259;
origin of the duck, i. 277;
ducks kept by the Romans, i. 278;
domestication of the goose, i. 287;
gander frequently white, i. 288;
breeds of turkeys, i. 293;
incubatory instinct of mongrels of non-sitting races of fowls, ii. 44;
aversion of the dove-cot pigeon to pair with fancy birds, ii. 103;
fertility of the goose, ii. 112;
general sterility of the guans in captivity, ii. 156;
fertility of geese in captivity, ii. 157;
white peafowl, ii. 332.
DOBELL, H., inheritance of anomalies of the extremities, ii. 14;
non-reversion to a malformation, ii. 36.
DOBRIZHOFFER, abhorrence of incest by the Abipones, ii. 123.
DOGS, origin of, i. 15;
ancient breeds of, i. 17, ii. 429;
of neolithic, bronze and iron periods in Europe, i. 18-19, ii. 427;
resemblance of to various species of canidae, i. 21;
of North America compared with wolves, i. 21-22;
of the West Indies, South America, and Mexico, i. 23, 31;
of Guiana, i. 23;
naked dogs of Paraguay and Peru, _ibid._ and 31;
dumb, on Juan Fernandez, i. 27;
of Juan de Nova, i. 27;
of La Plata, i. 27;
of Cuba, i. 27;
of St. Domingo, i. 28;
correlation of colour in, i. 28-29;
gestation of, i. 29-30;
hairless Turkish, i. 30, ii. 227;
inter-crossing of different breeds of, i. 31;
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;
reversion in fourth generation of, ii. 34;
of the Pacific Islands, ii. 87, 220, 303;
mongrel, ii. 92-93;
comparative facility of crossing different breeds of, ii. 102;
fertility of, ii. 111, 151;
inter-breeding of, ii. 120-121;
selection of, among the Greeks, ii. 202, 209;
among savages, ii. 206-207;