COCK. 



INDEX. 



COSMETORNIfe. 



635 



Cock, blind, fed by its companions, 

 103; game, killing a kite, 363; 

 comb and wattles of the, 403 ; pre- 

 ference shewn by the, for young 

 hens, 420 ; game, transparent zone 

 in the hackles of a, 430. 



Cock of the rock, 405. 



Cockatoos, 491, 492, 493; nestling, 

 411 ; black, immature plumage of, 

 467. 



Ccelenterata, absence of secondary 

 sexual characters in, 260. 



Coffee, fondness of monkeys for, 7. 



Cold, supposed effects of, 32 ; power 

 of supporting, by man, 182. 



Coleoptera, 294 ; stridulation of, 284 ; 

 stridulant organs of, discussed, 303. 



Colias edusa and hyale, 319. 



Collingwood, C, on the pugnacity of 

 the butterflies of Borneo, 307 ; on 

 butterflies being attracted by a 

 dead specimen of the same species, 

 317. 



Oolobus, absence of the thumb, 51. 



Colombia, flattened heads of savages 

 of, 575. 



Colonists, success of the English as, 

 142. 



Coloration, protective, in birds, 489. 



Colour, supposed to be dependent on 

 light and heat, 32 ; correlation of, 

 with immunity from certain poisons 

 and parasites, 193 ; purpose of, in 

 lepidoptera, 316 ; relation of, to 

 sexual functions, in fishes, 343 ; 

 difference of, in the sexes of snakes, 

 351 ; sexual differences of, in 

 lizards, 357 ; influence of, in the 

 pairing of birds of different species, 

 415; relation of, to nidification, 

 453, 456 ; sexual differences of, in 

 mammals, 533, 540 ; recognition of, 

 by quadrupeds, 540 ; of children, 

 iu different races of man, 557 ; of 

 the skin in man, 604. 



Colours, admired alike bv man and 

 animals, 93 ; bright, due to sexual 

 selection, 261 ; bright, among the 

 lower animals, 261, 262; bright, 

 protective to butterflies and moths, 

 313; bright, in male fishes, 335, 

 340 ; transmission of, in birds, 448. 



Oolquhoun, example of reasoning in 

 a retriever, 78. 



Columba passerine^ young of, 467. 



Cotynibus qlacialis, anomalous young 



of, 482.' 

 Comb, development of, in fowis, 239. 

 Combs and wattles in male birds, 403. 

 Community, preservation of variations 



useful to the, by natural selection, 



62. 

 Composite, gradation of species among 



the, 175. 

 Comte, C, on the expression of the 



ideal of beauty by sculpture, 581. 

 Conditions of life, action of changed, 



upon man, 30 ; influence of, on 



plumage of birds, 472. 

 Condor, eyes and comb of the, 472. 

 Conjugations, origin of, 91. 

 Conscience, 114, 126; absence of, in 



some criminals, 116. 

 Constitution, difference of, in different 



races of men, 168. 

 Consumption, liability of Ccb is Azarcs 



to, 7 ; connexion between com* 



plexion and, 194. 

 Convergence of characters, 177. 

 Cooing of pigeons and doves, 374. 

 Cook, Capt., on the nobles of the 



Sandwich Islands, 586. 

 Cope, E. D., on the Dinosauria, 158. 

 Cophotis ceylanica, sexual differences 



of, 354, 357. 

 Cupris, 295. 



■ Isidis, sexual differences of, 



296. 



lunaris, stridulation of, 303. 



Corals, bright colours of, 260. 



Coral-snakes, 353. 



Cordylus, sexual difference of colour 



in a species of, 357. 

 Corfu, habits of the Chaffinch in, 248. 

 Cornelius, on the proportions of the 



sexes in Lucanus Cervus, 253. 

 Corpora Wolffiana, 161 ; agreement 



of, with the kidneys of fishes, 11. 

 Correlated variation, 43. 

 Correlation, influence of, in the pro» 



duction of races, 197. 

 Corse, on the mode of fighting of the 



elephant, 514. 

 Corvus corone, 408. 



gracuhes, red beak of, 491. 



pica, nuptial assembly of, 



406. 



Corydalis cornutus, large jaws of th« 



male, 275. 

 Cosmetornis, 462. 



