i. 76;

definition of species of, i. 227.

_Cercopithecus cephus_, sexual difference of colour in, ii. 291, 311.

_Cercopithecus cynosurus_ and _griseo-viridis_, colour of the scrotum in, ii. 291.

_Cercopithecus Diana_, sexual differences of colour in, ii. 291, 311, 312.

_Cercopithecus griseo-viridis_, i. 75.

_Cercopithecus petaurista_, whiskers, &c., of, ii. 308.

CERES, of birds, bright colours of, ii. 227.

_Ceriornis Temminckii_, swelling of the wattles of the male during courtship, ii. 72.

_Cervulus_, weapons of, ii. 257.

_Cervulus moschatus_, rudimentary horns of the female, ii. 245.

_Cervus alces_, i. 288.

_Cervus campestris_, odour of, ii. 279.

_Cervus canadensis_, traces of horns in the female, ii. 245; attacking a man, ii. 253; sexual difference in the colour of, ii. 289.

_Cervus elaphus_, battles of male, ii. 240; horns of, with numerous points, ii. 252.

_Cervus Eldi_, i. 288.

_Cervus mantchuricus_, ii. 303.

_Cervus paludosus_, colours of, ii. 290.

_Cervus strongyloceros_, i. 288.

_Cervus virginianus_, i. 288; horns of, in course of modification, ii. 255.

_Ceryle_, male black-belted in some species of, ii. 173.

CETACEA, nakedness of, i. 148.

CEYLON, frequent absence of beard in the natives of, ii. 321.

CHAFFINCH, proportion of the sexes in the, i. 306, 307; courtship of the, ii. 94.

CHAFFINCHES, ii. 53; new mates found by, ii. 105.

_Chalcophaps indicus_, characters of young, ii. 185.

_Chalcosoma atlas_, sexual differences of, i. 368.

_Chamaeleon_, sexual differences in the genus, ii. 34.

_Chamaeleon bifurcus_, ii. 34, 35.

_Chamaeleon Owenii_, ii. 34, 36.

CHAMELEONS, ii. 32.

CHAMOIS, danger-signals of, i. 74; transfer of male characters to an old female, ii. 245.

_Chamaepetes unicolor_, modified wing-feather in the male, ii. 64.

CHAPUIS, Dr., on the transmission of sexual peculiarities in pigeons,