i. 31;

on abnormal conditions of the human uterus, i. 123; on the number of digits in the Ichthyopterygia, i. 125; on the canine teeth in man, i. 126; on the walking of the chimpanzee and orang, i. 139; on the mastoid processes in the higher apes, i. 143; on the hairiness of elephants in elevated districts, i. 149; on the caudal vertebrae of monkeys, i. 150; classification of mammalia, i. 187; on the hair in monkeys, i. 194; on the piscine affinities of the Ichthyosaurians, i. 204; on polygamy and monogamy among the antelopes, i. 267; on the horns of _Antilocapra americana_, i. 289; on the musky odour of crocodiles during the breeding season, ii. 29; on the scent-glands of snakes, ii. 30; on the Dugong, Cachalot and _Ornithorhynchus_, ii. 242; on the antlers of the red deer, ii. 252; on the dentition of the camelidae, ii. 257; on the tusks of the Mammoth, ii. 258; on the horns of the Irish elk, ii. 259; on the voice in the giraffe, porcupine, and stag, ii. 274; on the laryngeal sac of the gorilla and orang, ii. 276; on the odoriferous glands of mammals, ii. 279, 280; on the effects of emasculation on the vocal organs of men, ii. 330; on the voice of _Hylobates agilis_, ii. 332; on American monogamous monkeys, ii. 362.

OWLS, white, new mates found by, ii. 105.

_Oxynotus_, difference of the females of two species of, ii. 193.

P.

PACHYDERMATA, i. 268.

PAGET, on the abnormal development of hairs in man, i. 25; on the thickness of the skin on the soles of the feet of infants, i. 118.

PAINTING, i. 232.

_Palaemon_, chelae of a species of, i. 331.

_Palaeornis_, sexual differences of colour in, ii. 231.

_Palaeornis Javanicus_, colour of beak of, ii. 179.

_Palaeornis rosa_, young of, ii. 188.

_Palamedea cornuta_, spurs on the wings, ii. 47.

PALEOLITHIC period, i. 183.

PALESTINE, habits of the chaffinch in, i. 307.

PALLAS, on the perfection of the senses in the Mongolians, i. 119; on the want of connexion between climate and the colour of the skin,