628 



INDEX. 



poisons and parasites, 188; pur- 

 pose of, in lepidoptera. 313; rela- 

 tion of, to sexual functions, in 

 fishes, 339; difference of, in the 

 sexes of snakes, 347; sexual dif- 

 ferences of, in lizards, 353; in- 

 fluence of, in the pairing- of 

 birds of different species, 410; re- 

 lation of, to nidiflcation, 447, 551; 

 sexual differences of, in mam- 

 mals, 649; recognition of, by 

 quadrupeds, 535; of children, in 

 different races of man, 552; of 

 the skin in man, 598. 



Colors, admired alike by man and 

 animals, 90; bright, due to sex- 

 ual selection, 258; bright, among 

 the lower animals, 258, 259; 

 bright, protective to butterflies 

 and rnoths, 310; bright, in male 

 fishes, 332, 337; transmission of, 

 in birds, 442. 



Colquhoun, example of reasoning 

 in a retriever, 75. 



Columba passerina, young of, 

 461. 



Colymbus, glaoialis, anomalous 

 young of, 477. 



Comb, development of, in fowls, 

 233. 



Combs and wattles in male birds, 

 398. 



Community, preservation of va- 

 riations useful to the, by nat- 

 ural selection, 60. 



Compositse, gradation of species 

 among the, 170. 



Comte, C, on the expression of 

 the ideal of beauty by sculpture, 

 576. 



Conditions of life, action of 

 changed, upon man, 29; influ- 

 ence of, on plumage of birds, 

 467. 



Condor, eyes and comb of the, 

 472. 



Conjugations, origin of, 89. 



Conscience, 110, 122; absence of, in 

 some criminals, 112. 



Constitution, difference of in dif- 

 ferent races of men, 164. 



Consumption, liability of Cebus 

 Azara^ to, 7; connection be- 

 tween complexion and, 189. 



Convergence of characters, 173. 



Cooing of pigeons and doves, 370. 



Cook, Capt., on the nobles of the 

 Sandwich Islands, 581. 



Cope, B. D., on the Dinosauria, 

 154. 



Cophotis ceylanica, sexual differ- 

 ences of, 350, 353. 



Copris, 293. 



Isidis, sexual differences of, 



294. 



lunarls, stridulation of, 300. 



Corals, bright colors of, 257. 



Coral-snakes, 348. 



Cordylus, sexual difference of col- 

 or in a species of, 353. 



Corfu, habits of the Chaffinch ift, 



244. 

 Cornelius, on the proportions of 



the sexes in Lucanus Cervus, 



249. 

 Corpora Wolfflana, 156; agree- 

 ment of, with the kidneys of 



fishes, 11. 

 Correlated variation, 42. 

 Correlation, influence of, in the 



production of races, 192. 

 Corse, on the mode of fighting of 



the elephant, 509. 

 Corvus corone, 402. 



■ graculus, red beak of, 487. 



pica, nuptial assembly of, 



401. 

 Corydalis cornutus, large jaws of 



the male, 273. 

 Cosmetornis, 456. 

 • vexillarius, elongation of 



wing-feathers in, 379, 397. 

 Cotingidae, sexual differences in, 



214; coloration of the sexes of, 



453; resemblance of the females 



of distinct species of, 464. 

 Cottus scorpius, sexual differences 



in, 334. 

 Coulter, Dr., on the Calif ornian 



Indians, 254. 

 Counting, origin of, 140; limited 



power of, in primeval man, 175. 

 Courage, variability of, in the 



same species, 67; universal high 



appreciation of, 114; importance 



of, 127; characteristic of men, 



559. 

 Courtship, greater eagerness of 



males in, 216; of fishes, 328, 337; 



of birds, 363, 399. 

 Cow, winter change of color, 537. 

 Crab, devil, 265. 



, shore, habits of, 265. 



Crabro cribrarius, dilated tibi^ 



of the male, 273. 

 Crabs, proportions of the sexes in, 



252. 

 Cranz, on the inheritance of dex- 

 terity in seal catching, 32. 

 Crawfurd, on the number of 



species of man, 170. 

 Crenilabrus massa and C. raelops, 



nests built by, 341. 

 Crest, origin of, in Polish fowls, 



226. 

 Crests, of birds, difference of, in 



the sexes, 462; dorsal hairy, of 



mammals, 526. 

 Cricket, field-, stridulation of the, 



280; pugnacity of male, 286. 

 , house-, stridulation of the 



280, 282. 

 Crickets, sexual differences in, 



2S7. 

 Crioceridss, stridulation of the 



299. 

 Crinoids, complexity of, 89. 

 Croaking of frogs, 346. 

 Crocodiles musky odor of, dur- 

 ing the breeding season, 347. 



