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preferences in, 524; pairing preferently with those of the same colour, 540; numerical proportion of male and female births in, 245; formerly striped, 547.
 * Hottentot women, peculiarities of, 174.
 * Hottentots, lice of, 170; readily become musicians, 570; notions of female beauty of the, 578; compression of nose by, 583.
 * Hough, Dr. S., men's temperature more variable than women's, 224; proportion of sexes in man, 243.
 * House-slaves, difference of, from field-slaves, 196.
 * Houzeau, on the baying of the dog, 75; on reason in dogs, 76; birds killed by telegraph wires, 80; on the cries of domestic fowls and parrots, 85, 87; animals feel no pity, 102; suicide in the Aleutian islands, 117.
 * Howorth, H. H., extinction of savages, 183.
 * Huber, P., on ants playing together, 69; on memory in ants, 74; on the intercommunication of ants, 89; on the recognition of each other by ants after separation, 292.
 * Huc, on Chinese opinions of the appearance of Europeans, 578.
 * Huia, the, of New Zealand, 208.
 * Human, man classed alone in a, kingdom, 147.
 * sacrifices, 96.
 * Humanity, unknown among some savages, 118; deficiency of, among savages, 123.
 * Humboldt, A. von, on the rationality of mules, 78; on a parrot preserving the language of a lost tribe, 181; on the cosmetic arts of savages, 574; on the exaggeration of natural characters by man, 582; on the red painting of American Indians, 583.
 * Hume, D., on sympathetic feelings, 109.
 * Humming-bird, racket-shaped feathers in the tail of a, 384; display of plumage by the male, 394.
 * Humming-birds, ornament their nests, 92, 413; polygamous, 219; proportion of the sexes in, 248, 488; sexual differences in, 359, 442; pugnacity of male, 360; modified primaries of male, 378; coloration of the sexes of, 387; display by, 443; nidification of the, 453; colours of female, 453; young of, 487.
 * Humphreys, H. N., on the habits of the stickle-back, 220, 332.
 * Hunger, instinct of, 112.
 * Huns, ancient, flattening of the nose by the, 583.
 * Hunter, J., on the number of species of man, 174; on secondary sexual characters, 207; on the general behaviour of female animals during courtship, 222; on the muscles of the larynx in song-birds, 371; on the curled frontal hair of the bull, 531; on the rejection of an ass by a female zebra, 540.
 * Hunter, W. W., on the recent rapid increase of the Santali, 45; on the Santali, 192.
 * Huss, Dr. Max, on mammary glands, 162.
 * Hussey, Mr., on a partridge distinguishing persons, 412.
 * Hutchinson, Col., example of reasoning in a retriever, 78.
 * Hutton, Capt., on the male wild goat falling on his horns, 507.
 * Huxley, T. H., on the structural agreement of man with the apes, 2; on the agreement of the brain in man with that of lower animals, 6; on the adult age of the orang, 8; on the embryonic development of man, 9; on the origin of man, 3, 11; on variation in the skulls of the natives of Australia, 26; on the abductor of the fifth metatarsal in apes, 42; on the nature of the reasoning power, 77; on the position of man, 150; on the sub-orders of primates, 152; on the Lemuridæ, 157; on the Dinosauria, 158; on the amphibian affinities of the Iohthyosaurians, 159; on variability of the skull in certain races of man, 174; on the races of man, 176; supplement on the brain, 199.
 * Hybrid birds, production of, 414.
 * Hydrophobia communicable between man and the lower animals, 7.
 * Hydroporus, dimorphism of females of, 276.