The Descent of Man, and Selection in Relation to Sex

T.W., on the colouring of the orange-tip butterfly; on the habits of the Saturniidae; quarrels of chamaeleons; on the habits of Menura Alberti; on Tetrao cupido; on the display of plumage by male pheasants; on the ocellated spots of the Argus pheasant; on fighting of Menura superba; on the habits of the female cassowary. Woodcock, coloration of the. Woodpecker, selection of a mate by the female. Woodpeckers, tapping of; colours and nidification of the; characters of young. Woolner, Mr., observations on the ear in man. Wormald, Mr., on the coloration of Hypopyra. Wounds, healing of. Wren, young of the. Wright, C.A., on the young of Orocetes and Petrocincla. Wright, Chauncey, great brain-power requisite for language; on correlative acquisition; on the enlargement of the brain in man. Wright, Mr., on the Scotch deer-hound; on sexual preference in dogs; on the rejection of a horse by a mare. Wright, W. von, on the protective plumage of the Ptarmigan. Writing. Wyman, Prof., on the prolongation of the coccyx in the human embryo; on the condition of the great toe in the human embryo; on the occurrence of the supra-condyloid foramen in the humerus of man; on variation in the skulls of the natives of the Sandwich Islands; on the hatching of the eggs in the mouths and branchial cavities of male fishes. Xenarchus, on the Cicadae. Xenophon, selection in mankind advocated by. Xenorhynchus, sexual difference in the colour of the eyes in. Xiphophorus Hellerii, peculiar anal fin of the male. Xylocopa, difference of the sexes in. Yarrel, W., on the habits of the Cyprinidae; on Raia clavata; on the characters of the male salmon during the breeding season; on the characters of the rays; on the gemmeous dragonet; on colours of salmon; on the spawning of the salmon; on the incubation of the Lophobranchii; on rivalry in song-birds; on the trachea of the swan; on the moulting of the Anatidae; on the young of the waders. Yellow fever, immunity of negroes and mulattoes from. Youatt, Mr., on the development of the horns in cattle. Yura-caras, their notions of beauty. Zebra, rejection of an ass by a female; stripes of the. Zebus, humps of. Zigzags, prevalence of, as ornaments. Zincke, Mr., on European emigration to America. Zootoca vivipara, sexual difference in the colour of. Zouteveen, Dr., polydactylism; proportion of sexes at Cape of Good Hope; spiders attracted by music; on sounds produced by fish. Zygaenidae, coloration of the.