Guinea-fowl, monogamous; occasional polygamy of the; markings of the.

Guinea-pigs, inheritance of the effects of operations by.

Gulls, seasonal change of plumage in; white.

Gunther, Dr., on paddle of Ceradotus; on hermaphroditism in Serranus; on male fishes hatching ova in their mouths; on mistaking infertile female fishes for males; on the prehensile organs of male Plagiostomous fishes; spines and brushes on fishes; on the pugnacity of the male salmon and trout; on the relative size of the sexes in fishes; on sexual differences in fishes; on the genus Callionymus; on a protective resemblance of a pipe-fish; on the genus Solenostoma; on the coloration of frogs and toads; combat of Testudo elegans; on the sexual differences in the Ophidia; on differences of the sexes of lizards.

Gynanisa Isis, ocellated spots of.

Gypsies, uniformity of, in various parts of the world.

Habits, bad, facilitated by familiarity; variability of the force of.

Haeckel, E., on the origin of man; on rudimentary characters; on death caused by inflammation of the vermiform appendage; on the canine teeth in man; on the steps by which man became a biped; on man as a member of the Catarrhine group; on the position of the Lemuridae; on the genealogy of the Mammalia; on the lancelet; on the transparency of pelagic animals; on the musical powers of women.

Hagen, H., and Walsh, B.D., on American Neuroptera.

Hair, development of, in man; character of, supposed to be determined by light and heat; distribution of, in man; possibly removed for ornamental purposes; arrangement and direction of; of the early progenitors of man; different texture of, in distinct races; and skin, correlation of colour of; development of, in mammals; management of, among different peoples; great length of, in some North American tribes; elongation of the, on the human head; possible inherited effect of plucking out.

Hairiness, difference of, in the sexes in man; variation of, in races of men.

Hairs and excretory pores, numerical relation of, in sheep.

Hairy family, Siamese.

Halbertsma, Prof., hermaphroditism in Serranus.

Hamadryas baboon, turning over stones; mane of the male.

Hamilton, C., on the cruelty of the Kaffirs to animals; on the engrossment of the women by the Kaffir chiefs.

Hammering, difficulty of.

Hancock, A., on the colours of the nudibranch Mollusca.

Hands, larger at birth, in the children of labourers; structure of, in the quadrumana; and arms, freedom of, indirectly correlated with diminution of canines.

Handwriting, inherited.

Handyside, Dr., supernumerary mammae in men.

Harcourt, E. Vernon, on Fringilla cannabina.

Hare, protective colouring of the.

Harelda glacialis.

Hares, battles of male.

Harlan, Dr., on the difference between field- and house-slaves.

Harris, J.M., on the relation of complexion to climate.

Harris, T.W., on the Katy-did locust; on the stridulation of the grasshoppers; on Oecanthus nivalis; on the colouring of Lepidoptera; on the colouring of Saturnia Io.

Harting, spur of the Ornithorhynchus.

Hartman, Dr., on the singing of Cicada septendecim.

Hatred, persistence of.

Haughton, S., on a variation of the flexor pollicis longus in man.

Hawks, feeding orphan nestling.

Hayes, Dr., on the diverging of sledge-dogs on thin ice.

Haymond, R., on the drumming of the male Tetrao umbellus; on the drumming of birds.

Head, altered position of, to suit the erect attitude of man; hairiness of, in man; processes of, in male beetles; artificial alterations of the form of the.

Hearne, on strife for women among the North American Indians; on the North American Indians' notion of female beauty; repeated elopements of a North American woman.

Heart, in the human embryo.

Heat, supposed effects of.

Hectocotyle.

Hedge-warbler, young of the.

Heel, small projection of, in the Aymara Indians.

Hegt, M., on the development of the spurs in peacocks.

Heliconidae, mimicry of, by other butterflies.

Heliopathes, stridulation peculiar to the male.

Charles Darwin

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