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

of; Albino; European, number of species of; variability of; geographical distribution of colouring; gradation of secondary sexual characters in; obscurely coloured, building concealed nests; young female, acquiring male characters; breeding in immature plumage; moulting of; aquatic, frequency of white plumage in; vocal courtship of; naked skin of the head and neck in.

Birgus latro, habits of.

Birkbeck, Mr., on the finding of new mates by golden eagles.

Birthplace of man.

Births, numerical proportions of the sexes in, in animals and man; male and female, numerical proportion of, in England.

Bischoff, Prof., on the agreement between the brains of man and of the orang; figure of the embryo of the dog; on the convolutions of the brain in the human foetus; on the difference between the skulls of man and the quadrumana; resemblance between the ape’s and man’s.

Bishop, J., on the vocal organs of frogs; on the vocal organs of cervine birds; on the trachea of the Merganser.

Bison, American, co-operation of; mane of the male.

Bitterns, dwarf, coloration of the sexes of.

Biziura lobata, musky odour of the male; large size of male.

Blackbird, sexual differences in the; proportion of the sexes in the; acquisition of a song by; colour of the beak in the sexes of the; pairing with a thrush; colours and nidification of the; young of the; sexual difference in coloration of the.

Black-buck, Indian, sexual difference in the colour of the.

Blackcap, arrival of the male, before the female; young of the.

Black-cock, polygamous; proportion of the sexes in the; pugnacity and love-dance of the; call of the; moulting of the; duration of the courtship of the; and pheasant, hybrids of; sexual difference in coloration of the; crimson eye-cere of the.

Black-grouse, characters of young.

Blacklock, Dr., on music.

Blackwall, J., on the speaking of the magpie; on the desertion of their young by swallows; on the superior activity of male spiders; on the proportion of the sexes in spiders; on sexual variation of colour in spiders; on male spiders.

Bladder-nose Seal, hood of the.

Blaine, on the affections of dogs.

Blair, Dr., on the relative liability of Europeans to yellow fever.

Blake, C.C., on the jaw from La Naulette.

Blakiston, Captain, on the American snipe; on the dances of Tetrao phasianellus.

Blasius, Dr., on the species of European birds.

Bledius taurus, hornlike processes of male.

Bleeding, tendency to profuse.

Blenkiron, Mr., on sexual preference in horses.

Blennies, crest developed on the head of male, during the breeding season.

Blethisa multipunctata, stridulation of.

Bloch, on the proportions of the sexes in fishes.

Blood, arterial, red colour of.

Blood pheasant, number of spurs in.

Blow-fly, sounds made by.

Bluebreast, red-throated, sexual differences of the.

Blumenbach, on Man; on the large size of the nasal cavities in American aborigines; on the position of man; on the number of species of man.

Blyth, E., on the structure of the hand in the species of Hylobates; observations on Indian crows; on the development of the horns in the Koodoo and Eland antelopes; on the pugnacity of the males of Gallicrex cristatus; on the presence of spurs in the female Euplocamus erythrophthalmus; on the pugnacity of the amadavat; on the spoonbill; on the moulting of Anthus; on the moulting of bustards, plovers, and Gallus bankiva; on the Indian honey-buzzard; on sexual differences in the colour of the eyes of hornbills; on Oriolus melanocephalus; on Palaeornis javanicus; on the genus Ardetta; on the peregrine falcon; on young female birds acquiring male characters; on the immature plumage of birds; on representative species of birds; on the young of Turnix; on anomalous young of Lanius rufus and Colymbus glacialis; on the sexes and young of the sparrows; on dimorphism in some herons; on the ascertainment of the sex of nestling bullfinches by pulling out breast-feathers; on orioles breeding in immature plumage; on the sexes and young of Buphus and Anastomus; on the young of the blackcap and blackbird; on the young of the stonechat; on the white plumage of Anastomus; on the horns of Bovine animals; on the horns of Antilope bezoartica; on the mode of fighting of Ovis cycloceros; on the voice of the Gibbons; on the crest of the male wild goat; on the colours of Portax picta; on the colours of Antilope bezoartica; on the colour of the Axis deer; on sexual difference of colour in Hylobates hoolock; on the hog-deer; on the beard and whiskers in a monkey, becoming white with age.

Boar, wild, polygamous in India; use of the tusks by the; fighting of.

Boardman, Mr., Albino birds in U.S.

Boitard and Corbie, MM., on the transmission of sexual peculiarities in pigeons; on the antipathy shewn by some female pigeons to certain males.

Bold, Mr., on the singing of a sterile hybrid canary.

Bombet, on the variability of the standard of beauty in Europe.

Bombus, difference of the sexes in.

Bombycidae, coloration of; pairing of the; colours of.

Bombycilla carolinensis, red appendages of.

Bombyx cynthia, proportion of the sexes in; pairing of.

Bombyx mori, difference of size of the male and female cocoons of; pairing of.

Bombyx Pernyi, proportion of sexes of.

Bombyx Yamamai, M. Personnat on; proportion of sexes of.

Bonaparte, C.L., on the call-notes of the wild turkey.

Bond, F., on the finding of new mates by crows.

Bone, implements of, skill displayed in making.

Boner, C., on the transfer of male characters to an old female chamois; on the habits of stags; on the pairing of red deer.

Bones, increase of, in length and thickness, when carrying a greater weight.

Bonizzi, P., difference of colour in sexes of pigeons.

Bonnet monkey.

Bonwick, J., extinction of Tasmanians.

Boomerang.

Boreus hyemalis, scarcity of the male.

Bory St. Vincent, on the number of species of man; on the colours of Labrus pavo.

Bos etruscus.

Bos gaurus, horns of.

Bos moschatus.

Bos primigenius.

Bos sondaicus, horns of, colours of.

Botocudos, mode of life of; disfigurement of the ears and lower lip of the.

Boucher de Perthes, J.C. de, on the antiquity of man.

Bourbon, proportion of the sexes in a species of Papilio from.

Bourien on the marriage-customs of the savages of the Malay Archipelago.

Bovidae, dewlaps of.

Bower-birds, habits of the; ornamented playing-places of.

Bows, use of.

Brachycephalic structure, possible explanation of.

Brachyura.

Brachyurus calvus, scarlet face of.

Bradley, Mr., abductor ossis metatarsi quinti in man.

Brain, of man, agreement of the, with that of lower animals; convolutions of, in the human foetus; influence of development of mental faculties upon the size of the; influence of the development of on the spinal column and skull; larger in some existing mammals than in their tertiary prototypes; relation of the development of the, to the progress of language; disease of the, affecting speech; difference in the convolutions of, in different races of men; supplement on, by Prof. Huxley; development of the gyri and sulci.

Brakenridge, Dr., on the influence of climate.

Brandt, A., on hairy men.

Braubach, Prof., on the quasi-religious feeling of a dog towards his master; on the self-restraint of dogs.

Brauer, F., on dimorphism in Neurothemis.

Brazil, skulls found in caves of; population of; compression of the nose by the natives of.

Break between man and the apes.

Bream, proportion of the sexes in the.

Breeding, age of, in birds.

Breeding season, sexual characters making their appearance in the, in birds.

Brehm, on the effects of intoxicating liquors on monkeys; on the recognition of women by male Cynocephali; on the diversity of the mental faculties of monkeys; on the habits of baboons; on revenge taken by monkeys; on manifestations of maternal affection by monkeys and baboons; on the instinctive dread of monkeys for serpents; on the use of stones as missiles by baboons; on a baboon using a mat for shelter from the sun; on the signal-cries of monkeys; on sentinels posted by monkeys; on co-operation of animals; on an eagle attacking a young Cercopithecus; on baboons in confinement protecting one of their number from punishment; on the habits of baboons when plundering; on polygamy in Cynocephalus and Cebus; on the numerical proportion of the sexes in birds; on the love-dance of the blackcock; Palamedea cornuta; on the habits of the Black-grouse; on sounds produced by birds of paradise; on assemblages of grouse; on the finding of new mates by birds; on the fighting of wild boars; on sexual differences in Mycetes; on the habits of Cynocephalus hamadryas.

Brent, Mr., on the courtship of fowls.

Breslau, numerical proportion of male and female births in.

Bridgeman, Laura.

Brimstone butterfly, sexual difference of colour in the.

British, ancient, tattooing practised by.

Broca, Prof., on the occurrence of the supra-condyloid foramen in the human humerus; anthropomorphous apes more bipedal than quadrupedal; on the capacity of Parisian skulls at different periods; comparison of modern and mediaeval skulls; on tails of quadrupeds; on the influence of natural selection; on hybridity in man; on human remains from Les Eyzies; on the cause of the difference between Europeans and Hindoos.

Brodie, Sir B., on the origin of the moral sense in man.

Bronn, H.G., on the copulation of insects of distinct species.

Bronze period, men of, in Europe.

Brown, R., sentinels of seals generally females; on the battles of seals; on the narwhal; on the occasional absence of the tusks in the female walrus; on the bladder-nose seal; on the colours of the sexes in Phoca Groenlandica; on the appreciation of music by seals; on plants used as love-philters, by North American women.

Browne, Dr. Crichton, injury to infants during parturition.

Brown-Sequard, Dr., on the inheritance of the effects of operations by guinea-pig.

Bruce, on the use of the elephant’s tusks.

Brulerie, P. de la, on the habits of Ateuchus cicatricosus; on the stridulation of Ateuchus.

Brunnich, on the pied ravens of the Feroe islands.

Bryant, Dr., preference of tame pigeon for wild mate.

Bryant, Captain, on the courtship of Callorhinus ursinus.

Bubas bison, thoracic projection of.

Bubalus caffer, use of horns.

Bucephalus capensis, difference of the sexes of, in colour.

Buceros, nidification and incubation of.

Buceros bicornis, sexual differences in the colouring of the casque, beak, and mouth in.

Buceros corrugatus, sexual differences in the beak of.

Buchner, L., on the origin of man; on the use of the human foot as a prehensile organ; on the mode of progression of the apes; on want of self-consciousness, etc., in savages.

Bucholz, Dr., quarrels of chamaeleons.

Buckinghamshire, numerical proportion of male and female births in.

Buckland, F., on the numerical proportion of the sexes in rats; on the proportion of the sexes in the trout; on Chimaera monstrosa.

Buckland, W., on the complexity of crinoids.

Buckler, W., proportion of sexes of Lepidoptera reared by.

Bucorax abyssinicus, inflation of the neck-wattle of the male during courtship.

Budytes Raii.

Buffalo, Cape.

Buffalo, Indian, horns of the.

Buffalo, Italian, mode of fighting of the.

Buffon, on the number of species of man.

Bufo sikimmensis.

Bugs.

Buist, R., on the proportion of the sexes in salmon; on the pugnacity of the male salmon.

Bulbul, pugnacity of the male; display of under tail-coverts by the male.

Bull, mode of fighting of the; curled frontal hair of the.

Buller, Dr., on the Huia; the attachment of birds.

Bullfinch, sexual differences in the; piping; female, singing of the; courtship of the; widowed, finding a new mate; attacking a reed-bunting; nestling, sex ascertained by pulling out breast feathers.

Bullfinches, distinguishing persons; rivalry of female.

Bulls, two young, attacking an old one; wild, battles of.

Bull-trout, male, colouring of, during the breeding season.

Bunting, reed, head feathers of the male; attacked by a bullfinch.

Buntings, characters of young.

Buphus coromandus, sexes and young of; change of colour in.

Burchell, Dr., on the zebra; on the extravagance of a Bushwoman in adorning herself; celibacy unknown among the savages of South Africa; on the marriage-customs of the Bushwomen.

Burke, on the number of species of man.

Burmese, colour of the beard in.

Burton, Captain, on negro ideas of female beauty; on a universal ideal of