ii. 245;

on the antlers of the red deer, ii. 252; on the habits of stags, ii. 259; on the pairing of red deer, ii. 269.

BONES, increase of, in length and thickness, when carrying a greater weight, i. 116.

BONNET monkey, i. 192.

BOOMERANG, i. 183.

_Boreus hyemalis_, scarcity of the male, i. 314.

BORY St. Vincent, on the number of species of man, i. 226; on the colours of _Labrus pavo_, ii. 16.

_Bos gaurus_, horns of, ii. 247.

_Bos primigenius_, ii. 240.

_Bos sondaicus_, horns of, ii. 247; colours of, ii. 289.

BOTOCUDOS, i. 181; mode of life of, i. 247; disfigurement of the ears and lower lip of the, ii. 341.

BOUCHER de Perthes, J. C. de, on the antiquity of man, i. 3.

BOURBON, proportion of the sexes in a species of _Papilio_ from, i. 310.

BOURIEN, on the marriage-customs of the savages of the Malay Archipelago, ii. 373.

BOVIDAE, dewlaps of, ii. 284.

BOWER-BIRDS, ii. 102; habits of the, ii. 69; ornamented playing-places of, i. 63, ii. 112.

BOWS, use of, i. 232.

BRACHIOPODA, i. 329.

BRACHYCEPHALIC structure, possible explanation of, i. 148.

_Brachyscelus_, second pair of antennae in the male, i. 337.

BRACHYURA, i. 332.

_Brachyurus calvus_, scarlet face of, ii. 309.

BRAIN, of man, agreement of the, with that of lower animals, i. 10; convolutions of, in the human foetus, i. 16; larger in some existing mammals than in their tertiary prototypes,