Page:Descent of Man 1875.djvu/699

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* Turkey, wild, pugnacity of young male, 366; wild, notes of the, 375; swelling of the wattles of the male, 383; variety of, with a top-knot, 384; recognition of a dog by a, 412; male, wild, acceptable to domesticated females, 418; wild, first advances made by older females, 419; wild, breast-tuft of bristles of the, 461.
 * Turkey-cock, scraping of the wings of, upon the ground, 375; wild, display of plumage by, 394; fighting habits of, 404.
 * Turner, Prof. W., on muscular fasciculi in man referable to the panniculus carnosus, 13; on the occurrence of the supra-condyloid foramen in the human humerus, 21; on muscles attached to the coccyx in man, 22; on the filum terminale in man, 23; on the variability of the muscles, 26; on abnormal conditions of the human uterus, 39; on the development of the mammary glands, 162; on male fishes hatching ova in their mouths, 163, 345; on the external perpendicular fissure of the brain, 200; on the bridging convolutions in the brain of a chimpanzee, 201.
 * Turnix, sexes of some species of, 475; 480.
 * Turtle-dove, cooing of the, 374.
 * Tuttle, H., on the number of species of man, 174.
 * Tylor, E. B., on emotional cries, gestures, &c., of man, 85; on the origin of the belief in spiritual agencies, 94; remorse for violation of tribal usage in marrying, 115; on the primitive barbarism of civilised nations, 143; on the origin of counting, 144; inventions of savages, 145; on resemblances, of the mental characters in different races of man, 178.
 * Type of structure, prevalence of, 164.
 * Typhœus, stridulating organs of, 301; stridulation of, 303.
 * Tyranga œstiva, 462.
 * Twins, tendency to produce, hereditary, 45.
 * Twite, proportion of the sexes in the, 248.


 * Ugliness, said to consist in an approach to the lower animals, 584.
 * Umbrella-bird, 373,
 * Umbrina, sounds produced by, 347.
 * United States, rate of increase in, 44; influence of natural selection on the progress of, 142; change undergone by Europeans in the, 196.
 * Upupa epops, sounds produced by the male, 376.
 * Uraniidæ, coloration of the, 314.
 * Uria troile, variety of (= U. lacrymans), 424.
 * Urodela, 348.
 * Urosticte Benjamini, sexual differences in, 442.
 * Use and disuse of parts, effects of, 32; influence of, on the races of man, 197.
 * Uterus, reversion in the, 38; more or less divided, in the human subject, 38, 43; double, in the early progenitors of man, 161.


 * Vaccination, influence of, 134.
 * Vancouver Island, Mr. Sproat on the savages of, 183; natives of, eradication of facial hair by the, 580.
 * Vanellus cristatus, wing tubercles of the male, 366.
 * Vanessœ, 308; resemblance of lower surface of, to bark of trees, 311.
 * Variability, causes of, 28; in man, analogous to that in the lower animals, 29; of the races of man, 174; greater in men than in women, 223; period of, relation of the, to sexual selection, 240; of birds, 422; of secondary sexual characters in man, 559.
 * Variation, laws of, 29; correlated, 43; in man, 146; analogous, 152; analogous, in plumage of birds, 385.
 * Variations, spontaneous, 44.
 * Varieties, absence of, between two species, evidence of their distinctness, 167.
 * Variety, an object in nature, 493.
 * Variola, communicable between man and the lower animals, 7.