COCK. 
INDEX. 
CORPORA. 
421 
Cock, game, killing a kite, ii. 44 ; 
blind, fed by its companions, i. 77 ; 
comb and wattles of the, ii. 98 ; 
preference shown by the, for young 
hens, ii. 121 ; game, transparent 
zone in the hackles of a, ii. 136. 
Cock of the rock, ii. 100. 
Cockatoos, ii. 226, 228, 230 ; nest- 
- ling, ii. 109 ; black, immature plu- 
mage of, ii. 188. 
CoELEKTERATA, absence of secondary 
sexual characters in, i. 321. 
Coffee, fondness of monkeys for, i. 12. 
Cold, supposed effects of, i. 116; 
power of supporting, by man, i. 
237. 
COLEOPTERA, i. 366 ; stridulant or- 
gans of, discussed, i. 381. 
COLLIXGWOOD, C., on the pugnacity 
of the butterflies of Borneo, i. 386 ; 
on butterflies being attracted by a 
dead specimen of the same species, 
i. 400. 
Colombia, flattened heads of savages 
of, ii. 340. 
Colonists, success of the English as, 
i. 179. 
Coloration, protective, in birds, ii. 
223. 
Colour, supposed to be dependent on 
light and heat, i. 115 ; correlation 
of, with immunity from certain 
poisons and parasites, i. 242 ; pur- 
pose of, in lepidoptera, i. 399 ; re- 
lation of, to sexual functions, in 
fishes, ii. 14 ; difference of, in the 
sexes of snakes, ii. 29 ; sexual dif- 
ferences of, in lizards, ii. 36 ; in- 
fluence of, in the pairing of birds of 
different species, ii. 115; relation 
'Of, to nidification, ii. 167, 172; 
tsexual differences of, in mammals, 
ii. 286, 294; recognition of, by 
quadrupeds, ii. 295 ; of children, 
in different races of man, ii. 318 ; 
of the skin in man, ii. 381. 
Colours, admired alike by man and 
animals, i. 64 ; bright, due to sexual 
selection, i. 322 ; bright, among the 
lower animals, i. 322, 323 ; bright, 
protective to butterflies and moths, 
i. 395 ; bright, in male fishes, ii. 
7, 13 ; transmission of, in birds, ii. 
159. 
COLQUHOUN, example of reasoning in 
a retriever, i. 48. 
Columha passerina, young of, ii. 188. 
Golymhus glacialis^ anomalous young 
of, ii. 211. 
Comb, development of, in fowls, i. 
295. 
Combs and wattles in male birds, ii. 
98. 
Community, preservation of varia- 
tions useful to the, by natural 
selection, i. 155. 
CoMPOSiTAE, gradation of species 
among the, i. 227. 
Comte, C., on the expression of the 
ideal of beautv by sculpture, ii. 
380. 
Conditions of life, action of changed, 
upon man, i. 113; influence of, on 
plumage of birds, ii. 196. 
Condor, eyes and comb of the, ii. 
129. 
Conjugations, origin of, i. 61. 
Conscience, i. 91, 104 ; absence of, 
in some criminals, i. 92. 
Constitution, difference of, in dif- 
ferent races of men, i. 216. 
Consumption, liability of Cehus Aza- 
rm to, i. 12 ; connexion between 
complexion and, i. 244. 
Convergence, i. 230. 
Cooing of pigeons and doves, ii. 60. 
Cook, Capt., on the nobles of the 
Sandwich Islands, ii. 356. 
Cope, E. D., on the dinosauria, i. 
204; on the origin of genera, ii. 
215. 
Cophotis ceijlanica^ sexual differences 
of, ii. 32, 36. 
Copris^ i. 370. 
Copris Isidis, sexual differences of, i. 
369. 
Copr'is lunaris^ stridulation of, i. 380. 
Corals, bright colours of, i. 322. 
Coral-snakes, ii. 31. 
Cordylus, sexual difference of colour 
in a species of, ii. 36. 
Corfu, habits of the chaffinch in, i. 
307. 
Cornelius, on the proportions of the 
sexes in Lucanus Cervus^ i. 313. 
Corpora Wolffiana, i. 207 ; agree- 
ment of, with the kidneys of fishes, 
i. 16. 
