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* Hagen, H., and Walsh, B. D., on American Neuroptera, 254.
 * Hair, development of, in man, 18; character of, supposed to be determined by light and heat, 32; distribution of, in man, 57, 600; possibly removed for ornamental purposes, 58; arrangement and direction of, 151; of the early progenitors of man, 160; different texture of, in distinct races, 167; and skin, correlation of colour of, 197; development of, in mammals, 530; management of, among different peoples, 575; great length of, in some North American tribes, 580; elongation of the, on the human head, 603.
 * Hairiness, difference of, in the sexes in man, 559; variation of, in races of men, 559.
 * Hairs and excretory pores, numerical relation of, in sheep, 198.
 * Hairy family, Siamese, 601.
 * Halbertsma, Prof., hermaphroditism in Serranus, 162.
 * Hamadryas baboon, turning over stones, 101; mane of the male, 521.
 * Hamilton, C., on the cruelty of the Kaffirs to animals, 118; on the engrossment of the women by the Kaffir chiefs, 595.
 * Hammering, difficulty of, 49.
 * Hancock, A., on the colours of the nudibranch Mollusca, 261, 264.
 * Hands, larger at birth, in the children of labourers, 33; structure of, in the quadrumana, 50; and arms, freedom of, indirectly correlated with diminution of canines, 53.
 * Handwriting, inherited, 88.
 * Handyside, Dr., supernumerary mammæin men, 37.
 * Harcourt, E. Vernon, on Fringilla cannabina 394.
 * Harelda glacialis, 420.
 * Hare, protective colouring of the, 542.
 * Hares, battles of male, 500.
 * Harlan, Dr., on the difference between field- and house-slaves, 196.
 * Harris, J. M., on the relation of complexion to climate, 195.
 * , T. W., on the Katy-did locust, 283; on the stridulation of the grasshoppers, 286; on Œcanthus nivalis, 289; on the colouring of Lepidoptera, 314; on the colouring of Saturnia Io, 316.
 * Harting, spur of the Ornithorhynchus, 502.
 * Hartman, Dr., on the singing of Cicada septendecim, 282.
 * Hatred, persistence of, 112.
 * Haughton, S., on a variation of the flexor pollicis longus in man, 42.
 * Hawks, feeding orphan nestling, 409.
 * Hayes, Dr., on the diverging of sledge dogs on thin ice, 75.
 * Haymond, R., on the drumming of the male Tetrao umbellus, 375; on the drumming of birds, 376.
 * Head, altered position of, to suit the erect attitude of man, 55; hairiness of, in man, 57; processes of, in male beetles, 295; artificial alterations of the form of the, 583.
 * Hearne, on strife for women among the North American Indians, 361; on the North American Indians' notion of female beauty, 578; repeated elopements of a North American woman, 597.
 * Heart, in the human embryo, 9.
 * Heat, supposed effects of, 32.
 * Hectocotyle, 263.
 * Hedge-warbler, 473; young of the, 481.
 * Heel, small projection of, in the Aymara Indians, 35.
 * Hegt, M., on the development of the spurs in peacocks, 236.
 * Heliconidæ, 308; mimicry of, by other butterflies, 323.
 * Heliopathes, stridulation peculiar to the male, 305.
 * Heliothrix auriculata, young of, 467, 468.
 * Helix pomatia, example of individual attachment in, 263.
 * Hellins, J., proportions of sexes of Lepidoptera reared by, 253.
 * Helmholtz, on pleasure derived from harmonies, 92; on the vibration of the auditory hairs of crustacea, 568; the physiology of harmony, 659.
 * Hemiptera, 281.
 * Hemitragus, beardless in both sexes, 531.