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636

* Cosmetornis vexillarius, elongation of wing-feathers in, 384, 403.
 * Cotingidæ, sexual differences in, 219; coloration of the sexes of, 460; resemblance of the females of distinct species of, 470.
 * Cottus scorpius, sexual differences in, 337.
 * Coulter, Dr., on the Californian Indians, 258.
 * Counting, origin of, 114; limited power of, in primeval man, 180.
 * Courage, variability of, in the same species, 69; universal high appreciation of, 118; importance of, 130; characteristic of men, 564.
 * Courtship, greater eagerness of males in, 221; of fishes, 331, 341; of birds, 367, 405.
 * Cow, winter change of colour, 542.
 * Crab, devil, 269.
 * , shore, habits of, 268.
 * Crabro cribrarius, dilated tibiæ of the male, 276.
 * Crabs, proportions of the sexes in, 255.
 * Cranz, on the inheritance of dexterity in seal catching, 33.
 * Crawfurd, on the number of species of man, 174.
 * Crenilabrus massa and C. melops, nests built by, 345.
 * Crest, origin of, in Polish fowls, 231.
 * Crests, of birds, difference of, in the sexes, 467; dorsal hairy, of mammals, 530.
 * Cricket, field-, stridulation of the, 283; pugnacity of male, 289.
 * , house-, stridulation of the 283, 234.
 * Crickets, sexual differences in, 289.
 * Crioceridæ, stridulation of the, 302.
 * Crinoids, complexity of, 91.
 * Croaking of frogs, 350.
 * Crocodiles, musky odour of, during the breeding season, 351.
 * Crocodilia, 351.
 * Crossbills, characters of young, 464
 * Crosses in man, 173.
 * Crossing of races, effects of the, 192.
 * Crossoaptilon auritum, 400, 452, 472 adornment of both sexes of, 235; sexes alike in, 460.
 * Crotch. G. R., on the stridulation of beetles, 302, 304; on the stridulation of Heliopathes, 305; on the stridulation of Acalles, 306; habit of female deer at breeding time, 503.
 * Crow Indians, long hair of the, 580.
 * , young of the, 481.
 * Crows, 491 ; vocal organs of the, 370; living in triplets, 409.
 * , carrion, new mates found by, 407.
 * , Indian, feeding their blind companions, 103.
 * Cruelty of savages to animals, 118.
 * Crustacea, parasitic, loss of limbs by female, 208; prehensile feet and antennae of, 209; male, more active than female, 221; parthenogenesis in, 255; secondary sexual characters of, 265; amphipod, males sexually mature while young, 485; auditory hairs of, 568.
 * Crystal worn in the lower lip by some Central African women, 575.
 * Cuckoo fowls, 238.
 * Culicidæ, 208, 280; attracted by each other’s humming, 280.
 * Cullen, Dr., on the throat-pouch of the male bustard, 373.
 * Cultivation of plants, probable origin of, 133.
 * Cupples, Mr., on the numerical proportion of the sexes in dogs, sheep, and cattle, 246; on the Scotch deerhound, 516; on sexual preference in dogs, 524.
 * Curculionidæ, sexual difference in length of snout in some, 208; hornlike processes in male, 299; musical, 301, 302.
 * Curiosity, manifestations of, by animals, 71.
 * Curlews, double moult in, 390.
 * Cursores, comparative absence of sexual differences among the, 219.
 * Curtis, J., on the proportion of the sexes in Athalia, 254.
 * Curier, F., on the recognition of women by male quadrumana, 8.
 * , G., on the number of canudal vertebræ in the mandrill, 58; on instinct and intelligence, 67; views of, as to the position of man, 149; on the position of the seals, 150; on Hectocotyle, 263.
 * Cyanecula suecica, sexual differences of, 472.