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672

* Razor-bill, young of the, 486.
 * Reade, Winwood, suicide among savages in Africa, 117; mulattoes not prolific, 171; effect of castration of horned sheep, 506; on the Guinea sheep, 235; on the occurrence of a mane in an African ram, 533; on the negroes' appreciation of the beauty of their women, 577; on the admiration of negroes for a black skin, 579; on the idea of beauty among negroes, 582; on the Jollofs, 587; on the marriage-customs of the negroes, 599.
 * Reason, in animals, 75.
 * Redstart, American, breeding in immature plumage, 484.
 * Redstarts, new mates found by, 408.
 * Reduvidæ, stridulation of, 281.
 * Reed-bunting, head-feathers of the male, 402; attacked by a bull-finch, 412.
 * Reefs, fishes frequenting, 343.
 * Reeks, H., retention of horns by breeding deer, 503; cow rejected by a bull, 525; destruction of piebald rabbits by cats, 542.
 * Regeneration, partial, of lost parts in man, 8.
 * Regent-bird, 413.
 * Reindeer, horns of the, 233; battles of, 501; horns of the female, 503; antlers of, with numerous points, 510; winter change of the, 542; sexual preferences shewn by, 552.
 * Relationship, terms of, 590.
 * Religion, deficiency of, among certain races, 93; psychical elements of, 95.
 * Remorse, 114; deficiency of, among savages, 131.
 * Rengger, on the diseases of Cebus Azarœ, 7; on the diversity of the mental faculties of monkeys, 27; on the Payaguas Indians, 32; on the inferiority of Europeans to savages in their senses, 33; revenge taken by monkeys, 69; on maternal affection in a Cebus, 70; on the reasoning powers of American monkeys, 77; on the use of stones by monkeys for cracking hard nuts, 81; on the sounds uttered by Cebus Azarœ, 84; on the signal-cries of monkeys, 87; on the polygamous habits of Mycetes caraya, 217; on the voice of the howling monkeys, 527; on the odour of Cervus campestris, 529; on the beards of Mycetes caraya and Pithecia Satanas, 531; on the colours of Felis mitis, 534; on the colours of Cervus paludosus, 536; on sexual differences of colour in Mycetes, 537; on the colour of the infant Guaranys, 558; on the early maturity of the female of Cebus azarœ, 558; on the beards of the Guaranys, 561; on the emotional notes employed by monkeys, 572; on American polygamous monkeys, 590.
 * Representative species, of birds, 468.
 * Reproduction, unity of phenomena of, throughout the mammalia, 8; period of, in birds, 484.
 * Reproductive system, rudimentary structures in the, 23; accessory parts of, 161.
 * Reptiles, 350.
 * and birds, alliance of, 165.
 * Resemblances, small, between man and the apes, 150.
 * Retrievers, exercise of reasoning faculties by, 78.
 * Revenge, manifested by animals, 69.
 * Reversion, 36; perhaps the cause of some bad dispositions, 137.
 * Rhagium, difference of colour in the sexes of a species of, 294.
 * Rhamphastos carinatus, 492.
 * Rhea darwinii, 479.
 * Rhinoceros, nakedness of, 57; horns of, 505; horns of, used defensively, 518; attacking white or grey horses, 540.
 * Rhynchœa, sexes and young of, 476.
 * australis, 476.
 * bengalensis, 476.
 * capensis, 477.
 * Rhythm, perception of, by animals, 569.
 * Richard, M., on rudimentary muscles in man, 12.
 * Richardson, Sir J., on the pairing of Tetrao umbellus, 366; on Tetrao urophasianus, 372; on the drumming of grouse, 376; on the dances of Tetrao phasianellus, 381; on