The Descent of Man, and Selection in Relation to Sex · Charles Darwin
CHAPTER XXI. GENERAL A SUMMARY AND CONCLUSION.
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 beauty. Bushmen, marriage among. Bushwoman, extravagant ornamentation of a. Bushwomen, hair of; marriage-customs of. Bustard, throat-pouch of the male; humming noise produced by a male; Indian, ear-tufts of. Bustards, occurrence of sexual differences and of polygamy among the; love-gestures of the male; double moult in. Butler, A.G., on sexual differences in the wings of Aricoris epitus; courtship of butterflies; on the colouring of the sexes in species of Thecla; on the resemblance of Iphias glaucippe to a leaf; on the rejection of certain moths and caterpillars by lizards and frogs.
Butterfly, noise produced by a; Emperor; meadow brown, instability of the ocellated spots of. Butterflies, proportion of the sexes in; forelegs atrophied in some males; sexual difference in the neuration of the wings of; pugnacity of male; protective resemblances of the lower surface of; display of the wings by; white, alighting upon bits of paper; attracted by a dead specimen of the same species; courtship of; male and female, inhabiting different stations. Buxton, C., observations on macaws; on an instance of benevolence in a parrot. Buzzard, Indian honey-; variation in the crest of. Cabbage butterflies. Cachalot, large head of the male. Cadences, musical, perception of, by animals. Caecum, large, in the early progenitors of man. Cairina moschata, pugnacity of the male. Californian Indians, decrease of. Callianassa, chelae of, figured. Callidryas, colours of sexes. Callionymus lyra, characters of the male. Callorhinus ursinus, relative size of the sexes of; courtship of. Calotes maria. Calotes nigrilabris, sexual difference in the colour of. Cambridge, O. Pickard, on the sexes of spiders; on the size of male Nephila. Camel, canine teeth of male. Campbell, J., on the Indian elephant; on the proportion of male and female births in the harems of Siam. Campylopterus hemileucurus. Canaries distinguishing persons. Canary, polygamy of the; change of plumage in, after moulting; female, selecting the best singing male; sterile hybrid, singing of a; female, singing of the; selecting a greenfinch; and siskin, pairing of.
Cancer pagurus. Canestrini, G., on rudimentary characters and the origin of man; on rudimentary characters; on the movement of the ear in man; of the variability of the vermiform appendage in man; on the abnormal division of the malar bone in man; on abnormal conditions of the human uterus; on the persistence of the frontal suture in man; on the proportion of the sexes in silk-moths; secondary sexual characters of spiders. Canfield, Dr., on the horns of the Antilocapra. Canine teeth in man, diminution of, in man; diminution of, in horses; disappearance of, in male ruminants; large in the early progenitors of man. Canines, and horns, inverse development of. Canoes, use of. Cantharis, difference of colour in the sexes of a species of. Cantharus lineatus. Capercailzie, polygamous; proportion of the sexes in the; pugnacity of the male; pairing of the; autumn meetings of the; call of the; duration of the courtship of; behaviour of the female; inconvenience of black colour to the female; sexual difference in the coloration of the; crimson eye-cere of the male. Capitonidae, colours and nidification of the. Capra aegagrus, crest of the male; sexual difference in the colour of. Capreolus Sibiricus subecaudatus. Caprice, common to man and animals. Caprimulgus, noise made by the males of some species of, with their wings. Caprimulgus virginianus, pairing of. Carabidae.
Carbonnier, on the natural history of the pike; on the relative size of the sexes in fishes; courtship of Chinese Macropus. Carcineutes, sexual difference of colour in. Carcinus moenas. Cardinalis virginianus. Carduelis elegans, sexual differences of the beak in. Carnivora, marine, polygamous habits of; sexual differences in the colours of. Carp, numerical proportion of the sexes in the. Carr, R., on the peewit. Carrier pigeon, late development of the wattle in the. Carrion beetles, stridulation of. Carrion-hawk, bright coloured female of. Carus, Prof. V., on the development of the horns in merino sheep; on antlers of red deer. Cassowary, sexes and incubation of the. Castnia, mode of holding wings. Castoreum. Castration, effects of. Casuarius galeatus. Cat, convoluted body in the extremity of the tail of a; sick, sympathy of a dog with a. Cataract in Cebus Azarae. Catarrh, liability of Cebus Azarae to. Catarrhine monkeys. Caterpillars, bright colours of. Cathartes aura. Cathartes jota, love-gestures of the male. Catlin, G., correlation of colour and texture of hair in the Mandans; on the development of the beard among the North American Indians; on the great length of the hair in some North American tribes. Caton, J.D., on the development of the horns in Cervus virginianus and strongyloceros; on the wild turkey; on the presence of traces of horns in the female wapiti; on the fighting of deer; on the crest of the male wapiti; on the colours of the Virginian deer; on sexual differences of colour in the wapiti; on the spots of the Virginian deer.
Cats, dreaming; tortoise-shell; enticed by valerian; colours of. Cattle, rapid increase of, in South America; domestic, lighter in winter in Siberia; horns of; domestic, sexual differences of, late developed; numerical proportion of the sexes in. Caudal vertebrae, number of, in macaques and baboons; basal, of monkeys, imbedded in the body. Cavolini, observations on Serranus. Cebus, maternal affection in a; gradation of species of. Cebus Apella. Cebus Azarae, liability of, to the same diseases as man; distinct sounds produced by; early maturity of the female. Cebus capucinus, polygamous; sexual differences of colour in; hair on the head of. Cebus vellerosus, hair on the head of. Cecidomyiidae, proportions of the sexes in. Celibacy, unknown among the savages of South Africa and South America. Centipedes. Cephalopoda, absence of secondary sexual characters in. Cephalopterus ornatus. Cephalopterus penduliger. Cerambyx heros, stridulant organ of. Ceratodus, paddle of. Ceratophora aspera, nasal appendages of. Ceratophora Stoddartii, nasal horn of. Cerceris, habits of. Cercocebus aethiops, whiskers, etc., of. Cercopithecus, young, seized by an eagle and rescued by the troop; definition of species of. Cercopithecus cephus, sexual difference of colour in. Cercopithecus cynosurus and griseo-viridis, colour of the scrotum in. Cercopithecus Diana, sexual differences of colour in. Cercopithecus griseo-viridis. Cercopithecus petaurista, whiskers, etc., of. Ceres, of birds, bright colours of. Ceriornis Temminckii, swelling of the wattles of the male during courtship.
Cervulus, weapons of. Cervulus moschatus, rudimentary horns of the female. Cervus alces. Cervus campestris, odour of. Cervus canadensis, traces of horns in the female; attacking a man; sexual difference in the colour of. Cervus elaphus, battles of male; horns of, with numerous points; long hairs on the throat of. Cervus Eldi. Cervus mantchuricus. Cervus paludosus, colours of. Cervus strongyloceros. Cervus virginianus, horns of, in course of modification. Ceryle, male black-belted in some species of. Cetacea, nakedness of. Ceylon, frequent absence of beard in the natives of. Chaffinch, proportion of the sexes in the; courtship of the. Chaffinches, new mates found by. Chalcophaps indicus, characters of young. Chalcosoma atlas, sexual differences of. Chamaeleo, sexual differences in the genus; combats of. Chamaeleo bifurcus. Chamaeleo Owenii. Chamaeleo pumilus. Chamaepetes unicolor, modified wing-feather in the male. Chameleons. Chamois, danger-signals of; transfer of male characters to an old female. Champneys, Mr., acromio-basilar muscle and quadrupedal gait. Chapman, Dr., on stridulation in Scolytus. Chapuis, Dr., on the transmission of sexual peculiarities in pigeons; on streaked Belgian pigeons. Char, male, colouring of, during the breeding season. Characters, male, developed in females; secondary sexual, transmitted through both sexes; natural, artificial, exaggeration of, by man. Charadrus hiaticula and pluvialis, sexes and young of. Chardin on the Persians. Charms, worn by women. Charruas, freedom of divorce among the. Chasmorhynchus, difference of colour in the sexes of; colours of.
Chasmorhynchus niveus. Chasmorhynchus nudicollis. Chasmorhynchus tricarunculatus. Chastity, early estimation of. Chatterers, sexual differences in. Cheever, Rev. H.T., census of the Sandwich Islands. Cheiroptera, absence of secondary sexual characters in. Chelae of crustacea. Chelonia, sexual differences in. Chenalopex aegyptiacus, wing-knobs of. Chera progne. Chest, proportions of, in soldiers and sailors; large, of the Quechua and Aymara Indians. Chevrotains, canine teeth of. Chiasognathus, stridulation of. Chiasognathus Grantii, mandibles of. Children, legitimate and illegitimate, proportion of the sexes in. Chiloe, lice of the natives of; population of. Chimaera monstrosa, bony process on the head of the male. Chimaeroid fishes, prehensile organs of male. Chimpanzee, ears of the; representatives of the eyebrows in the; hands of the; absence of mastoid processes in the; platforms built by the; cracking nuts with a stone; direction of the hair on the arms of the; supposed evolution of the; polygamous and social habits of the. China, North, idea of female beauty in. China, Southern, inhabitants of. Chinese, use of flint tools by the; difficulty of distinguishing the races of the; colour of the beard in; general beardlessness of the; opinions of the, on the appearance of Europeans and Cingalese; compression of the feet of. Chinsurdi, his opinion of beards. Chlamydera maculata. Chloeon, pedunculated eyes of the male of. Chloephaga, coloration of the sexes in. Chlorocoelus Tanana. Chorda dorsalis.
Chough, red beak of the. Chromidae, frontal protuberance in male; sexual differences in colour of. Chrysemys picta, long claws of the male. Chrysococcyx, characters of young of. Chrysomelidae, stridulation of. Cicada pruinosa. Cicada septendecim. Cicadae, songs of the; rudimentary sound-organs in females of. Cicatrix of a burn, causing modification of the facial bones. Cichla, frontal protuberance of male. Cimetiere du Sud, Paris. Cincloramphus cruralis, large size of male. Cinclus aquaticus. Cingalese, Chinese opinion of the appearance of the. Cirripedes, complemental males of. Civilisation, effects of, upon natural selection; influence of, in the competition of nations. Clanging of geese, etc. Claparede, E., on natural selection applied to man. Clarke, on the marriage-customs of Kalmucks. Classification. Claus, C., on the sexes of Saphirina. Cleft-palate, inherited. Climacteris erythrops, sexes of. Climate, cool, favourable to human progress; power of supporting extremes of, by man; want of connexion of, with colour; direct action of, on colours of birds. Cloaca, existence of a, in the early progenitors of man. Cloacal passage existing in the human embryo. Clubs, used as weapons before dispersion of mankind. Clucking of fowls. Clythra 4-punctata, stridulation of. Coan, Mr., Sandwich-islanders. Cobbe, Miss, on morality in hypothetical bee-community. Cobra, ingenuity of a. Coccus. Coccyx, in the human embryo; convoluted body at the extremity of the; imbedded in the body. Cochin-China, notions of beauty of the inhabitants of.
Cock, blind, fed by its companion; game, killing a kite; comb and wattles of the; preference shewn by the, for young hens; game, transparent zone in the hackles of a. Cock of the rock. Cockatoos, nestling; black, immature plumage of. Coelenterata, absence of secondary sexual characters in. Coffee, fondness of monkeys for. Cold, supposed effects of; power of supporting, by man. Coleoptera, stridulation of; stridulant organs of, discussed. Colias edusa and hyale. Collingwood, C., on the pugnacity of the butterflies of Borneo; on butterflies being attracted by a dead specimen of the same species. Colobus, absence of the thumb. Colombia, flattened heads of savages of. Colonists, success of the English as. Coloration, protective, in birds. Colour, supposed to be dependent on light and heat; correlation of, with immunity from certain poisons and parasites; purpose of, in lepidoptera; relation of, to sexual functions, in fishes; difference of, in the sexes of snakes; sexual differences of, in lizards; influence of, in the pairing of birds of different species; relation of, to nidification; sexual differences of, in mammals; recognition of, by quadrupeds; of children, in different races of man; of the skin in man. Colours, admired alike by man and animals; bright, due to sexual selection; bright, among the lower animals; bright, protective to butterflies and moths; bright, in male fishes; transmission of, in birds.
Colquhoun, example of reasoning in a retriever. Columba passerina, young of. Colymbus glacialis, anomalous young of. Comb, development of, in fowls. Combs and wattles in male birds. Community, preservation of variations useful to the, by natural selection. Complexion, different in men and women, in an African tribe. Compositae, gradation of species among the. Comte, C., on the expression of the ideal of beauty by sculpture. Conditions of life, action of changed, upon man; influence of, on plumage of birds. Condor, eyes and comb of the. Conjugations, origin of. Conscience, absence of, in some criminals. Constitution, difference of, in different races of men. Consumption, liability of Cebus Azarae to; connection between complexion and. Convergence of characters. Cooing of pigeons and doves. Cook, Captain, on the nobles of the Sandwich Islands. Cope, E.D., on the Dinosauria. Cophotis ceylanica, sexual differences of. Copris. Copris Isidis, sexual differences of. Copris lunaris, stridulation of. Corals, bright colours of. Coral-snakes. Cordylus, sexual difference of colour in a species of. Corfu, habits of the Chaffinch in. Cornelius, on the proportions of the sexes in Lucanus Cervus. Corpora Wolffiana, agreement of, with the kidneys of fishes. Correlated variation. Correlation, influence of, in the production of races. Corse, on the mode of fighting of the elephant. Corvus corone. Corvus graculus, red beak of. Corvus pica, nuptial assembly of. Corydalis cornutus, large jaws of the male.
Cosmetornis. Cosmetornis vexillarius, elongation of wing-feathers in. Cotingidae, sexual differences in; coloration of the sexes of; resemblance of the females of distinct species of. Cottus scorpius, sexual differences in. Coulter, Dr., on the Californian Indians. Counting, origin of; limited power of, in primeval man. Courage, variability of, in the same species; universal high appreciation of; importance of; characteristic of men. Courtship, greater eagerness of males in; of fishes; of birds. Cow, winter change of colour. Crab, devil. Crab, shore, habits of. Crabro cribrarius, dilated tibiae of the male. Crabs, proportions of the sexes in. Cranz, on the inheritance of dexterity in seal-catching. Crawfurd, on the number of species of man. Crenilabrus massa and C. melops, nests, built by. Crest, origin of, in Polish fowls. Crests, of birds, difference of, in the sexes; dorsal hairy, of mammals. Cricket, field-, stridulation of the; pugnacity of male. Cricket, house-, stridulation of the. Crickets, sexual differences in. Crinoids, complexity of. Crioceridae, stridulation of the. Croaking of frogs. Crocodiles, musky odour of, during the breeding season. Crocodilia. Crossbills, characters of young. Crosses in man. Crossing of races, effects of the. Crossoptilon auritum, adornment of both sexes of; sexes alike in. Crotch, G.R., on the stridulation of beetles; on the stridulation of Heliopathes; on the stridulation of Acalles; habit of female deer at breeding time. Crow, Indians, long hair of the.
Crow, young of the. Crows, vocal organs of the; living in triplets. Crows, carrion, new mates found by. Crows, Indian, feeding their blind companions. Cruelty of savages to animals. Crustacea, parasitic, loss of limbs by female; prehensile feet and antennae of; male, more active than female; parthenogenesis in; secondary sexual characters of; amphipod, males sexually mature while young; auditory hairs of. Crystal worn in the lower lip by some Central African women. Cuckoo fowls. Culicidae, attracted by each other’s humming. Cullen, Dr., on the throat-pouch of the male bustard. Cultivation of plants, probable origin of. Cupples, Mr., on the numerical proportion of the sexes in dogs, sheep, and cattle; on the Scotch deerhound; on sexual preference in dogs. Curculionidae, sexual difference in length of snout in some; hornlike processes in male; musical. Curiosity, manifestations of, by animals. Curlews, double moult in. Cursores, comparative absence of sexual differences among the. Curtis, J., on the proportion of the sexes in Athalia. Cuvier, F., on the recognition of women by male quadrumana. Cuvier, G., on the number of caudal vertebrae in the mandrill; on instinct and intelligence; views of, as to the position of man; on the position of the seals; on Hectocotyle. Cyanalcyon, sexual difference in colours of; immature plumage of. Cyanecula suecica, sexual differences of. Cychrus, sounds produced by. Cycnia mendica, sexual difference of, in colour.
Cygnus ferus, trachea of. Cygnus immutabilis. Cygnus olor, white young of. Cyllo Leda, instability of the ocellated spots of. Cynanthus, variation in the genus. Cynipidae, proportion of the sexes in. Cynocephalus, difference of the young from the adult; male, recognition of women by; polygamous habits of species of. Cynocephalus babouin. Cynocephalus chacma. Cynocephalus gelada. Cynocephalus hamadryas, sexual difference of colour in. Cynocephalus leucophaeus, colours of the sexes of. Cynocephalus mormon, colours of the male. Cynocephalus porcarius, mane of the male. Cynocephalus sphinx. Cynopithecus niger, ear of. Cypridina, proportions of the sexes in. Cyprinidae, proportion of the sexes in the. Cyprinidae, Indian. Cyprinodontidae, sexual differences in the. Cyprinus auratus. Cypris, relation of the sexes in. Cyrtodactylus rubidus. Cystophora cristata, hood of. Dacelo, sexual difference of colour in. Dacelo Gaudichaudi, young male of. Dal-ripa, a kind of ptarmigan. Damalis albifrons, peculiar markings of. Damalis pygarga, peculiar markings of. Dampness of climate, supposed influence of, on the colour of the skin. Danaidae. Dances of birds. Dancing, universality of. Danger-signals of animals. Daniell, Dr., his experience of residence in West Africa. Darfur, protuberances artificially produced by natives of. Darwin, F., on the stridulation of Dermestes murinus. Dasychira pudibunda, sexual difference of colour in. Davis, A.H., on the pugnacity of the male stag-beetle. Davis, J.B., on the capacity of the skull in various races of men; on the beards of the Polynesians.
Death’s Head Sphinx. Death-rate higher in towns than in rural districts. Death-tick. De Candolle, Alph., on a case of inherited power of moving the scalp. Declensions, origin of. Decoration in birds. Decticus. Deer, development of the horns in; spots of young; horns of; use of horns of; horns of a, in course of modification; size of the horns of; female, pairing with one male whilst others are fighting for her; male, attracted by the voice of the female; male, odour emitted by. Deer, Axis, sexual difference in the colour of the. Deer, fallow, different coloured herds of. Deer, Mantchurian. Deer, Virginian, colour of the, not affected by castration; colours of. Deerhound, Scotch, greater size of the male. Defensive orders of mammals. De Geer, C., on a female spider destroying a male. Dekay, Dr., on the bladder-nose seal. Delorenzi, G., division of malar bone. Demerara, yellow fever in. Dendrocygna. Dendrophila frontalis, young of. Denison, Sir W., manner of ridding themselves of vermin among the Australians; extinction of Tasmanians. Denny, H., on the lice of domestic animals. Dermestes murinus, stridulation of. Descent traced through the mother alone. Deserts, protective colouring of animals inhabiting. Desmarest, on the absence of suborbital pits in Antilope subgutturosa; on the whiskers of Macacus; on the colour of the opossum; on the colours of the sexes of Mus minutus; on the colouring of the ocelot; on the colours of seals; on Antilope caama; on the colours of goats; on sexual difference of colour in Ateles marginatus; on the mandrill; on Macacus cynomolgus.
Desmoulins, on the number of species of man; on the muskdeer. Desor, on the imitation of man by monkeys. Despine, P., on criminals destitute of conscience. Development, embryonic of man; correlated. Devil, not believed in by the Fuegians. Devil-crab. Devonian, fossil-insect from the. Dewlaps, of Cattle and antelopes. Diadema, sexual differences of colouring in the species of. Diamond-beetles, bright colours of. Diastema, occurrence of, in man. Diastylidae, proportion of the sexes in. Dicrurus, racket-shaped feathers in; nidification of. Dicrurus macrocercus, change of plumage in. Didelphis opossum, sexual difference in the colour of. Differences, comparative, between different species of birds of the same sex. Digits, supernumerary, more frequent in men than in women; supernumerary, inheritance of; supernumerary, early development of. Dimorphism, in females of water-beetles; in Neurothemis and Agrion. Diodorus, on the absence of beard in the natives of Ceylon. Dipelicus Cantori, sexual differences of. Diplopoda, prehensile limbs of the male. Dipsas cynodon, sexual difference in the colour of. Diptera. Disease, generated by the contact of distinct peoples. Diseases, common to man and the lower animals; difference of liability to, in different races of men; new, effects of, upon savages; sexually limited. Display, coloration of Lepidoptera for; of plumage by male birds. Distribution, wide, of man; geographical, as evidence of specific distinctness in man. Disuse, effects of, in producing rudimentary organs; and use of parts, effects of; of parts, influence of, on the races of men.
Divorce, freedom of, among the Charruas. Dixon, E.S., on the pairing of different species of geese; on the courtship of peafowl. Dobrizhoffer, on the marriage-customs of the Abipones. Dobson, Dr., on the Cheiroptera; scent-glands of bats; frugivorous bats. Dogs, suffering from tertian ague; memory of; dreaming; diverging when drawing sledges over thin ice; exercise of reasoning faculties by; domestic, progress of, in moral qualities; distinct tones uttered by; parallelism between his affection for his master and religious feeling; sociability of the; sympathy of, with a sick cat; sympathy of, with his master; their possession of conscience; possible use of the hair on the fore-legs of the; races of the; numerical proportion of male and female births in; sexual affection between individuals of; howling at certain notes; rolling in carrion. Dolichocephalic structure, possible cause of. Dolphins, nakedness of. Domestic animals, races of; change of breeds of. Domestication, influence of, in removing the sterility of hybrids. D’Orbigny, A., on the influence of dampness and dryness on the colour of the skin; on the Yuracaras. Dotterel. Doubleday, E., on sexual differences in the wings of butterflies. Doubleday, H., on the proportion of the sexes in the smaller moths; males of Lasiocampa quercus and on the attraction of the Saturnia carpini by the female; on the proportion of the sexes in the Lepidoptera; on the ticking of Anobium tesselatum; on the structure of Ageronia feronia; on white butterflies alighting upon paper.
Ideas discussed in this chapter
Text from Project Gutenberg, public domain in the United States.