422 
CORRELATED. 
INDEX. 
CURIOSITY. 
Correlated variation, i. 130. 
Correlation, influence of, in the 
production of races, i. 247. 
Corse, on the mode of fighting of 
the elephant, ii. 257. 
Corvus cor one ^ ii. 104. 
Coi'vus graculus, red beak of, ii. 227. 
Co7'vus pica, nuptial assembly of, ii. 
102 . 
Corydalis cormitus, large jaws of the 
male, i. 342. 
Cosmetornis, ii. 181. 
Cosrnetornis vexillarius, elongation of 
wing-feathers in, ii. 73, 97. 
COTiNGiD^, sexual differences in, i. 
269 ; coloration of the sexes of, ii. 
177 ; resemblance of the females of 
distinct species of, ii. 192. 
Coitus scoi'piusy sexual differences in, 
ii. 9. 
Counting, origin of, i. 181 ; limited 
power of, in primeval man, i. 234. 
Courage, variability of, in the same 
species, i. 40 ; universal high appre- 
ciation of, i. 95 ; importance of, i. 
162 ; a characteristic of men, ii. 328. 
Courtship, greater eagerness of 
males in, i. 272 ; of fishes, ii. 2 ; 
of birds, ii. 50, 100. 
Cow, winter change of the, ii. 299. 
Crab, devil, i. 332. 
Crab, shore, habits of, i. 331. 
Crabro crihrarius, dilated tibiae of the 
male, i. 343. 
Crabs, proportions of the sexes in, i. 
315. 
Cranz, on the inheritance of dexte- 
rity in seal-catching, i. 117. 
Crawfurd, on the number of species 
of man, i. 226. 
Crenilabrus massa and C. melops, 
nests built by, ii. 19. 
Crest, origin of, in Polish fowls, i. 
284. 
Crests, of birds, difference of, in the 
sexes, ii. 189; dorsal hairy, of 
mammals, ii. 282. 
Cricket, field-, stridulation of the, i. 
353 ; pugnacity of male, i. 360. 
Cricket, house-, stridulation of the, 
i. 352, 354. 
Crickets, sexual differences in, i. 361. 
Criocerid^^ stridulation of the, i. 
379. 
Crinoids, complexity of, i. 61. 
Croaking of frogs, ii. 27. 
Crocodiles, musky odour of, during 
the breeding season, ii. 29. 
Crocodilia, ii. 28. 
Crossbills, characters of young, ii,. 
184. 
Crosses in man, i. 225. 
Crossing of races, effects of the, i, 
241. 
Cy'ossoptilon auritum, ii. 93, 166, 196 
adornment of both sexes of, i. 290 
sexes alike in, ii. 178. 
Crotch, G. R., on the stridulation of 
beetles, i. 379, 382; on the stridu- 
lation of JfeliopathcSy i. 383 ; on 
the stridulation of Acalles, i. 384. 
Crow Indians, long hair of the, ii. 
348. 
Crow, young of the, ii. 209. 
Crows, ii. 226 ; vocal organs of the, 
ii. 55 ; living in triplets, ii. 106. 
Crows, carrion, new mates found by, 
ii. 104. 
Crows, Indian, feeding their blind 
companions, i. 77. 
Cruelty of savages to animals, i. 94. 
Crustacea, amphipod, males sexually 
mature while young, ii. 215 * 
parasitic, loss of limbs by female, 
i. 255 ; prehensile feet and antennae 
of, i. 256 ; male, more active than 
female, i. 272 ; parthenogenesis in, 
i. 315 ; secondary sexual characters- 
of, i. 328 ; auditory hairs of, ii. 333. 
Crystal worn in the lower lip by some 
Central African women, ii. 341. 
Cuckoo fowls, i. 294. 
CuLiciDJE, i. 254, 349. 
Cullen, Dr., on the throat-pouch of 
the male bustai’d, ii. 58. 
Cultivation of plants, probable ori- 
gin of, i. 167. 
CUPPLES, Mr., on the numerical pro- 
portion of the sexes in dogs, sheep, 
and cattle, i. 304, 305 ; on the- 
Scotch deerhound, ii. 261 ; on sex- 
ual preference in dogs, ii. 271, 272. 
CURCULIONID^, sexual difference in 
length of snout in some, i. 255 ;; 
hornlike processes in male, i. 374;. 
musical, i. 378, 379. 
Curiosity, manifestations of, by ani- 
mals, i. 42. 
