ii. 260;

on the colours of the Marsupials, ii. 286.

GOUREAU, on the stridulation of _Mutilla europaea_, i. 366.

GOUT, sexually transmitted, i. 292.

GRABA, on the Pied Ravens of the Feroe Islands, ii. 126; on the Bridled Guillemot, ii. 127.

GRADATION of secondary sexual characters in birds, ii. 135.

GRALLATORES, absence of secondary sexual characters in, i. 270; double moult in some, ii. 81.

_Grallina_, nidification of, ii. 169.

GRASSHOPPERS, stridulation of the, i. 356.

GRATIOLET, Prof., on the anthropomorphous apes, i. 196; on the evolution of the anthropomorphous apes, i. 230.

GRAY, Asa, on the gradation of species among the Compositae, i. 227.

GRAY, J. E., on the caudal vertebrae of monkeys, i. 150; on the presence of rudiments of horns in the female of _Cervulus moschatus_, ii. 245; on the horns of goats and sheep, ii. 246; on the beard of the Ibex, ii. 283; on the Berbura goat, ii. 285; on sexual differences in the coloration of Rodents, ii. 286; on the colours of the Elands, ii. 288; on the Sing-sing antelope, ii. 289; on the colours of goats, ii. 290; on the Hog-deer, ii. 303.

"GREATEST happiness principle," i. 97, 98.

GREEKS, ancient, i. 177.

GREEN, A. H., on beavers fighting, ii. 239; on the voice of the beaver, ii. 277.

GREENFINCH, selected by a female canary, ii. 115.

GREG, W. R., on the early marriages of the poor, i. 173; on the Ancient Greeks, i. 178; on the effects of natural selection on civilised nations, i. 167.

GRENADIERS, Prussian, i. 112.

GREY, Sir G., on female infanticide in Australia, ii. 364.

GREYHOUNDS, numerical proportion of the sexes in, i. 263, 265; numerical proportion of male and female births in, i. 304.

GROUSE, red, monogamous, i. 269; pugnacity of young male, ii. 48; producing a sound by scraping their wings upon the ground, ii. 61; duration of courtship of, ii. 100; colours and nidification of, ii. 170.

GRUBE, Dr., on the occurrence of the supra-condyloid foramen in the humerus of man, i. 28.

_Grus americanus_, age of mature plumage in, ii. 213; breeding in immature plumage, ii. 214.

_Grus virgo_, trachea of, ii. 60.

_Gryllus campestris_, i. 353; pugnacity of male, i. 360.

_Gryllus domesticus_, i. 354.

_Grypus_, sexual differences in the beak in, ii. 39.

GUANACOES, battles of, ii. 239; canine teeth of, ii. 257.

GUANAS, strife for women among the, ii. 324; polyandry among the, ii. 366.

GUANCHE skeletons, occurrence of the supra-condyloid foramen in the humerus of, i. 29.

GUARANYS, proportion of men and women among, i. 302; colour of newborn children of the, ii. 318; beards of the, ii. 322.

GUENEE, A., on the sexes of _Hyperythra_, i. 310.

GUILDING, L., on the stridulation of the _Locustidae_, i. 352.

GUILLEMOT, variety of the, ii. 127.

GUINEA, sheep of, with males only horned, i. 289.

GUINEA-FOWL, monogamous, i. 269; occasional polygamy of the, i. 270; markings of the, ii. 134.

GUINEA-PIGS, inheritance of the effects of operations by, ii. 380.

GULL, instance of reasoning in a, ii. 108.

GULLS, seasonal change of plumage in, ii. 228; white, ii. 228.

GUENTHER, Dr., on hermaphroditism in _Serranus_, i. 208; on male fishes hatching ova in their mouths, i. 210, ii. 20; on mistaking infertile female fishes for males, i. 308; on the prehensile organs of male Plagiostomous fishes, ii. 2; on the pugnacity of the male salmon and trout, ii. 3; on the relative size of the sexes in fishes, ii. 7; on sexual differences in fishes, ii. 8 _et seqq._; on the genus _Callionymus_, ii. 9; on a protective resemblance in a Pipe-fish, ii. 18; on the genus _Solenostoma_, ii. 22; on _Megalophrys montana_, ii. 26; on the coloration of frogs and toads, ii. 26; on sexual differences in the Ophidia, ii. 29; on differences of the sexes of lizards, ii. 32 _et seqq._

_Gynanisa Isis_, ocellated spots of, ii. 132.

GYPSIES, uniformity of, in various parts of the world, i. 242.

H.

HABITS, bad, facilitated by familiarity, i. 101; variability of the force of, i. 183.

HAECKEL, E., on the origin of man, i. 4; on rudimentary characters, i. 17; on the canine teeth in man, i. 126; on death caused by inflammation of the vermiform appendage, i. 28; on the steps by which man became a biped, i. 142; on man as a member of the Catarrhine group, i. 199; on the position of the Lemuridae, i. 202; on the genealogy of the Mammalia, i. 203; on the lancelet, i. 204; on the transparency of pelagic animals, i. 323; on the musical powers of women, ii. 337.

HAGEN, H., and Walsh, B. D., on American neuroptera, i. 314.

HAIR, development of, in man, i. 24; character of, supposed to be determined by light and heat, i. 116; distribution of, in man, i. 149, ii. 375; possibly removed for ornamental purposes, i. 149; arrangement and direction of, i. 192; of the early progenitors of man, i. 206; different texture of, in distinct races, i. 216; and skin, correlation of colour of, i. 248; development of, in mammals, ii. 281; management of, among different peoples, ii. 340; great length of, in some North American tribes, ii. 348; elongation of the, on the human head, ii. 380.

HAIRINESS, difference of, in the sexes, in man, ii. 320; variation of, in races of men, ii. 321.

HAIRS and excretory pores, numerical relation of, in sheep, i. 248.

HAIRY family, Siamese, ii. 378.

HAMADRYAS baboon, turning over stones, i. 75; mane of the male, ii. 267.

HAMILTON, C., on the cruelty of the Kafirs to animals, i. 94; on the engrossment of the women by the Kafir chiefs, ii. 369.

HAMMERING, difficulty of, i. 138.

HANCOCK, A., on the colours of the nudibranch mollusca, i. 326.

HANDS, larger at birth, in the children of labourers, i. 117; structure of, in the quadrumana, i. 139; and arms, freedom of, indirectly correlated with diminution of canines, i. 144.

HANDWRITING, inherited, i. 58.

HARCOURT, E. Vernon, on _Fringilla cannabina_, ii. 86.

_Harelda glacialis_, ii. 122.

HARE, protective colouring of the, ii. 298.

HARES, battles of male, ii. 239.

HARLAN, Dr., on the difference between field- and house-slaves, i. 246.

HARRIS, J. M., on the relation of complexion to climate, i. 245.

HARRIS, T. W., on the Katy-did locust, i. 353; on the stridulation of the grasshoppers, i. 357; on _Oecanthus nivalis_, i. 361; on the colouring of Lepidoptera, i. 396; on the colouring of _Saturnia Io_, i. 398.

HARRY-LONG-LEGS, pugnacity of male, i. 349.

HARTMAN, Dr., on the singing of _Cicada septendecim_, i. 351.

HAUGHTON, S., on a variation of the _flexor pollicis longus_ in man, i. 129.

HAWKS, feeding orphan nestling, ii. 107.

HAYES, Dr., on the diverging of sledge-dogs on thin ice, i. 46.

HEAD, altered position of, to suit the erect attitude of man, i. 143; hairiness of, in man, i. 149; processes of, in male beetles, i. 370; artificial alterations of the form of the, ii. 351.

HEARNE, on strife for women among the North American Indians, ii. 324; on the North American Indians' notion of female beauty, ii. 344; repeated elopements of a North American woman, ii. 372.

HEART, in the human embryo, i. 16.

HEAT, supposed effects of, i. 116.

_Hectocotyle_, i. 325.

HEDGE-WARBLER, ii. 198; young of the, ii. 209.

HEEL, small projection of, in the Aymara Indians, i. 120.

HEGT, M., on the development of the spurs in peacocks, i. 290.

HELICONIDAE, i. 387; mimickry of, by other butterflies, i. 411.

_Heliopathes_, stridulation peculiar to the male, i. 383.

_Heliothrix auriculata_, young of, ii. 188, 189.

_Helix pomatia_, example of individual attachment in, i. 325.

HELLINS, J., proportions of sexes of Lepidoptera reared by, i. 313.

HELMHOLTZ, on the vibration of the auditory hairs of crustacea, ii. 333.

HEMIPTERA, i. 349.

_Hemitragus_, beardless in both sexes, ii. 283.

HEPBURN, Mr., on the autumn song of the water-ouzel, ii. 54.

_Hepialus humuli_, sexual difference of colour in the, i. 399, 402.

HERBS, poisonous, avoided by animals, i. 36.

HERMAPHRODITISM of embryos, i. 207.

_Herodias bubulcus_, vernal moult of, ii. 84.

HERON, love-gestures of a, ii. 68.

HERON, Sir R., on the habits of peafowl, ii. 119, 120, 152.

HERONS, decomposed feathers in, ii. 74; breeding plumage of, ii. 82, 83; young of the, ii. 208; sometimes dimorphic, ii. 214; continued growth of crest and plumes in the males of some, ii. 216; change of colour in some, ii. 231.

_Hetaerina_, difference in the sexes of, i. 362; proportion of the sexes in, i. 314.

_Heterocerus_, stridulation of, i. 379.

HEWITT, Mr. on a game-cock killing a kite, ii. 44; on the recognition of dogs and cats by ducks, ii. 110; on the pairing of a wild duck with a pintail drake, ii. 115; on the courtship of fowls, ii. 117; on the coupling of pheasants with common hens, ii. 122.

HINDOO, his horror of breaking his caste, i. 99, 103.

HINDOOS, local difference of stature among, i. 115; difference of, from Europeans, i. 240; colour of the beard in, ii. 319.

_Hipparchia Janira_, instability of the ocellated spots of, ii. 132.

_Hipparchiae_, i. 387.

_Hippocampus_, development of, i. 210; marsupial receptacles of the male, ii. 21.

HIPPOPOTAMUS, nakedness of, i. 148.

HIPS, proportions of, in soldiers and sailors, i. 117.

HODGSON, S., on the sense of duty, i. 71.

HOFFBERG, on the horns of the reindeer, ii. 244; on sexual preferences shown by reindeer, ii. 273.

HOG, wart-, ii. 265; river-, ii. 266.

HOG-DEER, ii. 303.

HOLLAND, Sir H., on the effects of new diseases, i. 238.

HOMOLOGOUS structures, correlated variation of, i. 130.

HOMOPTERA, i. 350; stridulation of the, and orthoptera, discussed, i. 360.

HONDURAS, _Quiscalus major_ in, i. 307.

HONEY-BUZZARD of India, variation in the crest of, ii. 126.

HONEY-SUCKERS, moulting of the, ii. 83; Australian, nidification of, ii. 169.

HONOUR, law of, i. 99.

HOOKER, Jos., on the colour of the beard in man, ii. 319.

HOOLOCK GIBBON, nose of, i. 192.

HOOPOE, ii. 56; sounds produced by the male, ii. 62.

_Hoplopterus armatus_, wing-spurs of, ii. 48.

HORNBILL, African, inflation of the neck-wattle of the male during courtship, ii. 72.

HORNBILLS, sexual difference in the colour of the eyes in, ii. 129; nidification and incubation of, ii. 169.

HORNE, C., on the rejection of a brightly-coloured locust by lizards and birds, i. 361.

HORNS, of deer, ii. 243, 248, 259; and canine teeth, inverse development of, ii. 257; sexual differences of, in sheep and goats, i. 283; loss of, in female merino sheep, i. 284; development of, in deer, i. 288; development of, in antelopes, i. 289; from the head and thorax, in male beetles, i. 370.

HORSE, polygamous, i. 267; canine teeth of male, ii. 241; winter change of the, ii. 298; fossil, extinction of the, in South America, i. 239.

HORSES, dreaming, i. 46; rapid increase of, in South America, i. 135; diminution of canine teeth in, i. 144; of the Falkland Islands and Pampas, i. 236; numerical proportion of the sexes in, i. 263, 265; lighter in winter in Siberia, i. 282; sexual preferences in, ii. 272; pairing preferentially with those of the same colour, ii. 295; numerical proportion of male and female births in, i. 303; formerly striped, ii. 305.

HOTTENTOT women, peculiarities of, i. 225.

HOTTENTOTS, lice of, i. 220; readily become musicians, ii. 334; notions of female beauty of the, ii. 345; compression of nose by, ii. 352.

HOUSE-SLAVES, difference of, from field-slaves, i. 246.

HUBER, P., on ants playing together, i. 39; on memory in ants, i. 45; on the intercommunication of ants, i. 58; on the recognition of each other by ants after separation, i. 365.

HUC, on Chinese opinions of the appearance of Europeans, ii. 345.

HUMAN kingdom, i. 186.

HUMAN sacrifices, i. 68.

HUMANITY, unknown among some savages, i. 94; deficiency of, among savages, i. 101.

HUMBOLDT, A. von, on the rationality of mules, i. 48; on a parrot preserving the language of a lost tribe, i. 236; on the cosmetic arts of savages, ii. 339, 340; on the exaggeration of natural characters by man, ii. 351; on the red painting of American Indians, ii. 352.

HUME, D., on sympathetic feelings, i. 85.

HUMMING-BIRD, racket-shaped feathers in the tail of a, ii. 73; display of plumage by the male, ii. 86.

HUMMING-BIRDS, ornament their nests, i. 63, ii. 112; polygamous, i. 269; proportion of the sexes in, i. 307, ii. 221; sexual differences in, ii. 39, 40, 151; pugnacity of male, ii. 40; modified primaries of male, ii. 65; coloration of the sexes of, ii. 78; young of, ii. 220; nidification of the, ii. 168; colours of female, ii. 168.

HUMPHREYS, H. N., on the habits of the Stickleback, i. 271, ii. 2.

HUNGER, instinct of, i. 89.

HUNS, ancient, flattening of the nose by the, ii. 352.

HUNTER, J., on the number of species of man, i. 226; on secondary sexual characters, i. 253; on the general behaviour of female animals during courtship, i. 273; on the muscles of the larynx in song-birds, ii. 55; on the curled frontal hair of the Bull, ii. 282; on the rejection of an ass by a female zebra, ii. 295.

HUNTER, W. W., on the recent rapid increase of the Santali, i. 133; on the Santali, i. 241.

HUSSEY, Mr., on a partridge distinguishing persons, ii. 110.

HUTCHINSON, Col., example of reasoning in a retriever, i. 48.

HUTTON, Capt., on the male wild goat falling on his horns, ii. 249.

HUXLEY, T. H., on the structural agreement of man with the apes, i. 3; on the agreement of the brain in man with that of lower animals,