ii. 242;

on the bladder-nose seal, ii. 278; on the colours of the sexes in _Phoca groenlandica_, ii. 287; on the appreciation of music by seals, ii. 333; on plants used as love-philters, by North American women, ii. 344.

BROWN-SEQUARD, Dr., on the inheritance of the effects of operations by guinea pigs, ii. 380.

BRUCE, on the use of the elephant's tusks, ii. 249.

BRULERIE, P. de la, on the habits of _Ateuchus cicatricosus_, i. 376; on the stridulation of _Ateuchus_, i. 384.

BRUENNICH, on the pied ravens of the Feroe islands, ii. 126.

BRYANT, Capt., on the courtship of _Callorhinus ursinus_, ii. 269.

_Bubas bison_, thoracic projection of, i. 372.

_Bucephalus capensis_, difference of the sexes of, in colour, ii. 29.

_Buceros_, nidification and incubation of, ii. 169.

_Buceros bicornis_, sexual differences in the colouring of the casque, beak, and mouth in, ii. 129.

_Buceros corrugatus_, sexual difference in the beak of, ii. 72.

BUECHNER, L., on the origin of man, i. 4; on the want of self-consciousness, &c., in low savages, i. 62; on the use of the human foot as a prehensile organ, i. 142; on the mode of progression of the apes, i. 142.

BUCKLAND, F., on the numerical proportion of the sexes in rats,