mutual fertility of different breeds, i. 51;
feral, i. 51;
habit of scraping away snow, i. 53;
mode of production of breeds of, i. 54;
inheritance and diversity of colour in, i. 55;
dark stripes in, i. 56-61, ii. 351;
dun-coloured, origin of, i. 59;
colours of feral, i. 60-61;
effect of fecundation by a Quagga on the subsequent progeny of, i.
403-404;
inheritance of peculiarities in, ii. 10-11;
polydactylism in, ii. 14;
inheritance of colour in, ii. 21;
inheritance of exostoses in legs of, ii. 23;
reversion in, ii. 33, 41;
hybrids of, with ass and zebra, ii. 42;
prepotency of transmission in the sexes of, ii. 65;
segregation of, in Paraguay, ii. 102;
wild species of, breeding in captivity, ii. 150;
curly, in Paraguay, ii. 205, 325;
selection of, for trifling characters, ii. 209;
unconscious selection of, ii. 212-213;
natural selection in Circassia, ii. 225;
alteration of coat of, in coal-mines, ii. 278;
degeneration of, in the Falkland Islands, ii. 278;
diseases of, caused by shoeing, ii. 300;
feeding on meat, ii. 305;
white and white-spotted, poisoned by mildewed vetches, ii. 337;
analogous variations in the colour of, ii. 349;
teeth developed on palate of, ii. 391;
of bronze period in Denmark, ii. 427.
HORSE-CHESNUT, early, at the Tuileries, i. 362;
tendency to doubleness in, ii. 168.
HORSE-RADISH, general sterility of the, ii. 170.
"HOUDAN," a French sub-breed of fowls, i. 229.
HOWARD, C., on an Egyptian monument, i. 17;
on crossing sheep, ii. 95, 120.
HUC, on the Emperor Khang-hi, ii. 205;
Chinese varieties of the bamboo, ii. 256.
HUMBOLDT, A., character of the Zambos, ii. 47;
parrot speaking the language of an extinct tribe, ii. 154;
on _Pulex penetrans_, ii. 275.
HUMIDITY, injurious effect of, upon horses, i. 53.
HUMPHREYS, Col., on Ancon sheep, i. 100.
HUNGARIAN cattle, i. 80.
{458}
HUNTER, John, period of gestation in the dog, i. 29;
on secondary sexual characters, i. 179;
fertile crossing of _Anser ferus_ and the domestic goose, i. 288;
inheritance of peculiarities in gestures, voice, &c., ii. 6;
assumption of male characters by the human female, ii. 51;
period of appearance of hereditary diseases, ii. 78;
graft of the spur of a cock upon its comb, ii. 296;
on the stomach of _Larus tridentatus_, ii.