i. 345;

on the colouring of the sexes in species of _Thecla_, i. 389; on the resemblance of _Iphias glaucippe_ to a leaf, i. 394; on the rejection of certain moths and caterpillars by lizards and frogs, i. 417.

BUTTERFLY, noise produced by a, i. 387; Emperor, i. 386, 388; meadow brown, instability of the ocellated spots of, ii. 132.

BUTTERFLIES, proportion of the sexes in, i. 309; forelegs atrophied in some male, i. 344; sexual difference in the neuration of the wings of, i. 345; pugnacity of male, i. 386; protective resemblances of the lower surface of, i. 392; display of the wings by, i. 396; white, alighting upon bits of paper, i. 400; attracted by a dead specimen of the same species, i. 400; courtship of, i. 400; male and female, inhabiting different stations, i. 403.

BUXTON, C., observations on macaws, i. 76; on an instance of benevolence in a parrot, ii. 109.

BUZZARD, Indian honey-, variation in the crest of, ii. 126.

C.

CABBAGE butterflies, i. 393.

CACHALOT, large head of the male, ii. 242.

CADENCES, musical, perception of, by animals, ii. 333.

CAECUM, i. 27; large, in the early progenitors of man, i. 206.

_Cairina moschata_, pugnacity of the male, ii. 43.

_Callianassa_, chelae of, figured, i. 330.

_Callionymus lyra_, characters of the male, ii. 7.

_Callorhinus ursinus_, relative size of the sexes of, ii. 260; courtship of, ii. 269.

_Calotes nigrilabris_, sexual difference in the colour of, ii. 36.

CAMBRIDGE, O. Pickard, on the sexes of spiders, i. 315.

CAMEL, canine teeth of male, ii. 241, 257.

CAMPBELL, J., on the Indian elephant, i. 267, 268; on the proportion of male and female births in the harems of Siam, i. 303.

_Campylopterus hemileucurus_, i. 307.

CANARIES distinguishing persons, ii. 110.

CANARY, polygamy of the, i. 270; change of plumage in, after moulting, i. 294; female, selecting the best singing male, ii. 52; sterile hybrid, singing of a, ii. 53; female, singing of the, ii. 54; selecting a greenfinch, ii. 115; and siskin, pairing of, ii. 115.

CANESTRINI, G., on rudimentary characters and the origin of man, i. 4; on rudimentary characters, i. 17; on the movement of the ear in man, i. 20; on the variability of the vermiform appendage in man, i. 27; on the abnormal division of the malar bone in man, i. 124; on abnormal conditions of the human uterus, i. 124; on the persistence of the frontal suture in man, i. 125; on the proportion of the sexes in silk-moths, i. 309, 311.

CANINE teeth in man, i. 126; diminution of, in man, i. 144; diminution of, in horses, i. 144; disappearance of, in male ruminants, i. 144; large, in the early progenitors of man, i. 206.

CANINES, and horns, inverse development of, ii. 257.

CANOES, use of, i. 137, 234.

_Cantharis_, difference of colour in the sexes of a species of, i. 367.

CAPERCAILZIE, proportion of the sexes in the, i. 306; pugnacity of the male, ii. 45; pairing of the, ii. 49; autumn meetings of the, ii. 54; call of the, ii. 61; duration of the courtship of, ii. 100; behaviour of the female, ii. 121; inconvenience of black colour to the female, ii. 154; sexual difference in coloration of the, ii. 226; crimson eye-cere of the male, ii. 227; polygamous, i. 269.

CAPITAL, i. 169.

CAPITONIDAE, colours and nidification of the, ii. 171.

_Capra aegagrus_, ii. 249; crest of the male, ii. 282; sexual difference in the colour of, ii. 289.

_Capreolus Sibiricus subecaudatus_, ii. 298.

CAPRICE, common to man and animals, i. 65.

_Caprimulgus_, noise made by the males of some species of, with their wings, ii. 62.

_Caprimulgus virginianus_, pairing of, ii. 49.

CARABIDAE, bright colours of, i. 367.

CARBONNIER, on the natural history of the pike, i. 308; on the relative size of the sexes in fishes, ii. 7.

_Carcineutes_, sexual difference of colour in, ii. 173.

_Carcinus maenas_, i. 331, 333.

_Carduelis elegans_, sexual differences of the beak in, ii. 39.

CARNIVORA, marine, polygamous habits of, i. 268; sexual differences in the colours of, ii. 286.

CARP, numerical proportion of the sexes in the, i. 308.

CARR, R., on the peewit, ii. 48.

CARRIER pigeon, late development of the wattle in the, i. 293.

CARRION beetles, stridulation of, i. 378.

CARUS, Prof. V., on the development of the horns in merino sheep, i. 289.

CASSOWARY, sexes and incubation of the, ii. 204.

CASTOREUM, ii. 279.

_Casuarius galeatus_, ii. 204.

CAT, convoluted body in the extremity of the tail of a, i. 30; sick, sympathy of a dog with a, i. 77.

CATARACT in _Cebus Azarae_, i. 12.

CATARRH, liability of _Cebus Azarae_ to, i. 11.

CATARRHINE monkeys, i. 196.

CATERPILLARS, bright colours of, i. 415.

_Cathartes aura_, ii. 116.

_Cathartes jota_, love-gestures of the male, ii. 68.

CATLIN, G., on the development of the beard among North American Indians, ii. 322; on the great length of the hair in some North American tribes, ii. 348.

CATON, J. D., on the development of the horns in _Cervus virginianus_ and _strongyloceros_, i. 288; on the presence of traces of horns in the female wapiti, ii. 245; on the fighting of deer, ii. 252; on the crest of the male wapiti, ii. 282; on the colours of the Virginian deer, ii. 288; on sexual differences of colour in the wapiti, ii. 289; on the spots of the Virginian deer, ii. 303.

CATS, dreaming, i. 46; tortoise-shell, i. 283, 285, 293; enticed by valerian, ii. 281; colours of, ii. 299.

CATTLE, domestic, sexual differences of, late developed, i. 293; rapid increase of, in South America, i. 135; domestic, lighter in winter in Siberia, i. 282; horns of, i. 289, ii. 247; numerical proportion of the sexes in, i. 305.

CAUDAL vertebrae, number of, in macaques and baboons, i. 150; basal, of monkeys, imbedded in the body, i. 151.

_Cebus_, maternal affection in a, i. 40; gradation of species of, i. 227.

_Cebus Azarae_, liability of, to the same diseases as man, i. 11; distinct sounds produced by, i. 53; early maturity of the female, ii. 318.

_Cebus capucinus_, polygamous, i. 266; sexual differences of colour in, ii. 290; hair on the head of, ii. 307.

_Cebus vellerosus_, hair on the head of, ii. 307.

CECIDOMYIDAE, proportions of the sexes in, i. 314.

CELIBACY, unknown among the savages of South Africa and South America, ii. 367.

CENTIPEDES, i. 339.

CEPHALOPODA, absence of secondary sexual characters in, i. 325.

_Cephalopterus ornatus_, ii. 58, 59.

_Cephalopterus penduliger_, ii. 59.

_Cerambyx heros_, stridulant organ of, i. 380.

_Ceratophora aspera_, nasal appendages of, ii. 34.

_Ceratophora Stoddartii_, nasal horn of, ii. 34.

_Cerceris_, habits of, i. 364.

_Cercocebus aethiops_, whiskers, &c., of, ii. 308.

_Cercopithecus_, young, seized by an eagle and rescued by the troop,