i. 305;

on the proportion of the sexes in the trout, i. 308; on _Chimaera monstrosa_, ii. 12.

BUCKLAND, W., on the complexity of crinoids, i. 61.

BUCKLER, W., proportion of sexes of Lepidoptera reared by, i. 313.

BUCKINGHAMSHIRE, numerical proportion of male and female births in, i. 300.

_Bucorax abyssinicus_, inflation of the neck-wattle of the male, during courtship, ii. 72.

_Budytes Raii_, i. 260.

BUFFALO, Cape, ii. 250.

BUFFALO, Indian, horns of the, ii. 247.

BUFFALO, Italian, mode of fighting of the, ii. 250.

BUFFON, on the number of species of man, i. 226.

BUGS, i. 349.

BUIST, R., on the proportion of the sexes in salmon, i. 308; on the pugnacity of the male salmon, ii. 3.

BULBUL, pugnacity of the male, ii. 41; display of under tail-coverts by the male, ii. 96.

BULL, mode of fighting of the, ii. 250; curled frontal hair of the, ii. 282.

BULLFINCH, sexual differences in the, i. 269; piping, ii. 52; female, singing of the, ii. 54; courtship of the, ii. 94; widowed, finding a new mate, ii. 105; attacking a reed-bunting, ii. 111; nestling, sex ascertained by pulling out breast-feathers, ii. 214.

BULLFINCHES distinguishing persons, ii. 110; rivalry of female, ii. 121.

BULLS, two young, attacking an old one, i. 75; wild, battles of, ii. 240.

BULL-TROUT, male, colouring of, during the breeding season, ii. 14.

BUNTING, reed, head feathers of the male, ii. 95; attacked by a bullfinch, ii. 111.

BUNTINGS, characters of young, ii. 184.

_Buphus coromandus_, sexes and young of, ii. 217; change of colour in, ii. 231, 232.

BURCHELL, Dr., on the zebra, ii. 302; on the extravagance of a Bushwoman in adorning herself, ii. 344; celibacy unknown among the savages of South Africa, ii. 367; on the marriage-customs of the Bushwomen, ii. 374.

BURKE, on the number of species of man, i. 226.

BURMESE, colour of the beard in, ii. 319.

BURTON, Capt., on negro ideas of female beauty, ii. 346; on a universal ideal of beauty, ii. 351.

BUSHMEN, i. 157.

BUSHWOMAN, extravagant ornamentation of a, ii. 344.

BUSHWOMEN, hair of, i. 216; marriage-customs of, ii. 374.

BUSK, Prof. G., on the occurrence of the supra-condyloid foramen in the human humerus, i. 28.

BUSTARD, throat-pouch of the male, ii. 58; humming noise produced by a male, ii. 65; Indian, ear-tufts of a, ii. 73.

BUSTARDS, occurrence of sexual differences and of polygamy among the,