The Descent of Man by Charles Darwin (children's ebooks online TXT) 📖

and man.

Testudo elegans.

Testudo nigra.

Tetrao cupido, battles of; sexual difference in the vocal organs of.

Tetrao phasianellus, dances of; duration of dances of.

Tetrao scoticus.

Tetrao tetrix, pugnacity of the male.

Tetrao umbellus, pairing of; battles of; drumming of the male.

Tetrao urogalloides, dances of.

Tetrao urogallus, pugnacity of the male.

Tetrao urophasianus, inflation of the oesophagus in the male.

Thamnobia, young of.

Thecla, sexual differences of colouring in species of.

Thecla rubi, protective colouring of.

Thecophora fovea.

Theognis, selection in mankind.

Theridion, stridulation of males of.

Theridion lineatum.

Thomisus citreus, and Thomisus floricolens, difference of colour in the sexes of.

Thompson, J.H., on the battles of sperm-whales.

Thompson, W., on the colouring of the male char during the breeding season; on the pugnacity of the males of Gallinula chloropus; on the finding of new mates by magpies; on the finding of new mates by Peregrine falcons.

Thorax, processes of, in male beetles.

Thorell, T., on the proportion of sexes in spiders.

Thornback, difference in the teeth of the two sexes of the.

Thoughts, control of.

Thrush, pairing with a blackbird; colours and nidification of the.

Thrushes, characters of young.

Thug, remorse of a.

Thumb, absence of, in Ateles and Hylobates.

Thury, M., on the numerical proportion of male and female births among the Jews.

Thylacinus, possession of the marsupial sac by the male.

Thysanura.

Tibia, dilated, of the male Crabro cribrarius.

Tibia and femur, proportions of, in the Aymara Indians.

Tierra del Fuego, marriage-customs of.

Tiger, colours and markings of the.

Tigers, depopulation of districts by, in India.

Tillus elongatus, difference of colour in the sexes of.

Timidity, variability of, in the same species.

Tinca vulgaris.

Tipula, pugnacity of male.

Tits, sexual difference of colour in.

Toads, male, treatment of ova by some; male, ready to breed before the female.

Todas, infanticide and proportion of sexes; practice polyandry; choice of husbands amongst.

Toe, great, condition of, in the human embryo.

Tomicus villosus, proportion of the sexes in.

Tomtit, blue, sexual difference of colour in the.

Tonga Islands, beardlessness of the natives of.

Tooke, Horne, on language.

Tools, flint; used by monkeys; use of.

Topknots in birds.

Tortoise, voice of the male.

Tortures, submitted to by American savages.

Totanus, double moult in.

Toucans, colours and nidification of the; beaks and ceres of the.

Towns, residence in, a cause of diminished stature.

Toynbee, J., on the external shell of the ear in man.

Trachea, convoluted and imbedded in the sternum, in some birds; structure of the, in Rhynchaea.

Trades, affecting the form of the skull.

Tragelaphus, sexual differences of colour in.

Tragelaphus scriptus, dorsal crest of; markings of.

Tragopan, swelling of the wattles of the male, during courtship; display of plumage by the male; marking of the sexes of the.

Tragops dispar, sexual difference in the colour of.

Training, effect of, on the mental difference between the sexes of man.

Transfer of male characters to female birds.

Transmission, equal, of ornamental characters, to both sexes in mammals.

Traps, avoidance of, by animals; use of.

Treachery, to comrades, avoidance of, by savages.

Tremex columbae.

Tribes, extinct; extinction of.

Trichius, difference of colour in the sexes of a species of.

Trigla.

Trigonocephalus, noise made by tail of.

Trimen, R., on the proportion of the sexes in South African butterflies; on the attraction of males by the female Lasiocampa quercus; on Pneumora; on difference of colour in the sexes of beetles; on moths brilliantly coloured beneath; on mimicry in butterflies; on Gynanisa Isis, and on the ocellated spots of Lepidoptera; on Cyllo Leda.

Tringa, sexes and young of.

Tringa cornuta.

Triphaena, coloration of the species of.

Tristram, H.B., on unhealthy districts in North Africa; on the habits of the chaffinch in Palestine; on the birds of the Sahara; on the animals inhabiting the Sahara.

Triton cristatus.

Triton palmipes.

Triton punctatus.

Troglodyte skulls, greater than those of modern Frenchmen.

Troglodytes vulgaris.

Trogons, colours and nidification of the.

Tropic-birds, white only when mature.

Tropics, freshwater fishes of the.

Trout, proportion of the sexes in; male, pugnacity of the.

Trox sabulosus, stridulation of.

Truth, not rare between members of the same tribe; more highly appreciated by certain tribes.

Tulloch, Major, on the immunity of the negro from certain fevers.

Tumbler, almond, change of plumage in the.

Turdus merula, young of.

Turdus migratorius.

Turdus musicus.

Turdus polyglottus, young of.

Turdus torquatus.

Turkey, wild, pugnacity of young male; wild, notes of the; swelling of the wattles of the male; variety of, with a top-knot; recognition of a dog by a; male, wild, acceptable to domesticated females; wild, first advances made by older females; wild, breast-tuft of bristles of the.

Turkey-cock, scraping of the wings of, upon the ground; wild, display of plumage by; fighting habits of.

Turner, Prof. W., on muscular fasciculi in man referable to the panniculus carnosus; on the occurrence of the supra-condyloid foramen in the human humerus; on muscles attached to the coccyx in man; on the filum terminale in man; on the variability of the muscles; on abnormal conditions of the human uterus; on the development of the mammary glands; on male fishes hatching ova in their mouths; on the external perpendicular fissure of the brain; on the bridging convolutions in the brain of a chimpanzee.

Turnix, sexes of some species of.

Turtle-dove, cooing of the.

Tuttle, H., on the number of species of man.

Tylor, E.B., on emotional cries, gestures, etc., of man; on the origin of the belief in spiritual agencies; remorse for violation of tribal usage in marrying; on the primitive barbarism of civilised nations; on the origin of counting; inventions of savages; on resemblances, of the mental characters in different races of man.

Type of structure, prevalence of.

Typhaeus, stridulating organs of; stridulation of.

Twins, tendency to produce, hereditary.

Twite, proportion of the sexes in.

Ugliness, said to consist in an approach to the lower animals.

Umbrella-bird.

Umbrina, sounds produced by.

United States, rate of increase in; influence of natural selection on the progress of; change undergone by Europeans in the.

Upupa epops, sounds produced by the male.

Uraniidae, coloration of the.

Uria troile, variety of (=U. lacrymans).

Urodela.

Urosticte Benjamini, sexual differences in.

Use and disuse of parts, effects of; influence of, on the races of man.

Uterus, reversion in the; more or less divided, in the human subject; double, in the early progenitors of man.

Vaccination, influence of.

Vancouver Island, Mr. Sproat on the savages of; natives of, eradication of facial hair by the.

Vanellus cristatus, wing tubercles of the male.

Vanessae, resemblance of lower surface of, to bark of trees.

Variability, causes of; in man, analogous to that in the lower animals; of the races of man; greater in men than in women; period of, relation of the, to sexual selection; of birds; of secondary sexual characters in man.

Variation, laws of; correlated; in man; analogous; analogous, in plumage of birds.

Variations, spontaneous.

Varieties, absence of, between two species, evidence of their distinctness.

Variety, an object in nature.

Variola, communicable between man and the lower animals.

Vaureal, human bones from.

Veddahs, monogamous habits of.

Veitch, Mr., on the aversion of Japanese ladies to whiskers.

Vengeance, instinct of.

Venus Erycina, priestesses of.

Vermes.

Vermiform appendage.

Verreaux, M., on the attraction of numerous males by the female of an Australian Bombyx.

Vertebrae, caudal, number of in macaques and baboons; of monkeys, partly imbedded in the body.

Vertebrata, common origin of the; most ancient progenitors of; origin of the voice in air-breathing.

Vesicula prostatica, the homologue of the uterus.

Vibrissae, represented by long hairs in the eyebrows.

Vidua.

Vidua axillaris.

Villerme, M., on the influence of plenty upon stature.

Vinson, Aug., courtship of male spider; on the male of Epeira nigra.

Viper, difference of the sexes in the.

Virey, on the number of species of man.

Virtues, originally social only; gradual appreciation of.

Viscera, variability of, in man.

Vlacovich, Prof., on the ischio-pubic muscle.

Vocal music of birds.

Vocal organs of man; of birds; of frogs; of the Insessores; difference of, in the sexes of birds; primarily used in relation to the propagation of the species.

Vogt, Karl, on the origin of species; on the origin of man; on the semilunar fold in man; on microcephalous idiots; on the imitative faculties of microcephalous idiots; on skulls from Brazilian caves; on the evolution of the races of man; on the formation of the skull in women; on the Ainos and negroes; on the increased cranial difference of the sexes in man with race development; on the obliquity of the eye in the Chinese and Japanese.

Voice in mammals; in monkeys and man; in man; origin of, in air-breathing vertebrates.

Von Baer, see Baer.

Vulpian, Prof., on the resemblance between the brains of man and the higher apes.

Vultures, selection of a mate by the female; colours of.

Waders, young of.

Wagner, R., on the occurrence of the diastema in a Kaffir skull; on the bronchi of the black stork.

Wagtail, Ray’s, arrival of the male before the female.

Wagtails, Indian, young of.

Waist, proportions of, in soldiers and sailors.

Waitz, Prof., on the number of species of man; on the liability of negroes to tropical fevers after residence in a cold climate; on the colour of Australian infants; on the beardlessness of negroes; on the fondness of mankind for ornaments; on negro ideas of female beauty; on Javan and Cochin Chinese ideas of beauty.

Waldeyer, M., on the hermaphroditism of the vertebrate embryo.

Wales, North, numerical proportion of male and female births in.

Walkenaer and Gervais, spider attracted by music; on the Myriapoda.

Walker, Alex., on the large size of the hands of labourers’ children.

Walker, F., on sexual differences in the diptera.

Wallace, Dr. A., on the prehensile use of the tarsi in male moths; on the rearing of the Ailanthus silkmoth; on breeding Lepidoptera; proportion of sexes of Bombyx cynthia, B. yamamai, and B. Pernyi reared by; on the development of Bombyx cynthia and B. yamamai; on the pairing of Bombyx cynthia.

Wallace, A.R., on the origin of man; on the power of imitation in man; on the use of missiles by the orang; on the varying appreciation of truth among different tribes; on the limits of natural selection in man; on the occurrence of remorse among savages; on the effects of natural selection on civilised nations; on the use of the convergence of the hair at the elbow in the orang; on the contrast in the characters of the Malays and Papuans; on the line of separation between the Papuans and Malays; on the birds of paradise; on the sexes of Ornithoptera Croesus; on protective resemblances; on the relative sizes of the sexes of insects; on Elaphomyia; on the pugnacity of the males of Leptorhynchus angustatus; on sounds produced by Euchirus longimanus; on the colours of Diadema; on Kallima; on the protective colouring of moths; on bright coloration as protective in butterflies; on variability in the Papilionidae; on male and female butterflies, inhabiting different stations; on the protective nature of the dull colouring of female butterflies; on mimicry in butterflies; on the bright colours of caterpillars; on brightly-coloured fishes frequenting reefs; on the coral snakes; on Paradisea apoda; on the display of plumage by male birds of paradise; on assemblies of birds of paradise; on the instability of the ocellated spots in Hipparchia Janira; on sexually limited inheritance; on the sexual coloration of birds; on the relation between the colours and nidification of birds; on the coloration of the Cotingidae; on the females of Paradisea apoda and papuana; on the incubation of the cassowary; on protective coloration in birds; on the Babirusa; on the markings of the tiger; on the beards of the Papuans; on the hair of the Papuans; on the distribution of hair on the human body.

Walrus, development of the nictitating membrane in the; tusks of the; use of the tusks by the.

Walsh, B.D., on the proportion of the sexes in Papilio Turnus; on the Cynipidae and Cecidomyidae; on the jaws of Ammophila;