Cornelius, on the proportions of the sexes in Lucanus Cervus.
Corpora Wolffiana, agreement of, with the kidneys of fishes.
Correlation, influence of, in the production of races.
Corse, on the mode of fighting of the elephant.
Corvus graculus, red beak of.
Corvus pica, nuptial assembly of.
Corydalis cornutus, large jaws of the male.
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;
characteristic of men.
Courtship, greater eagerness of males in;
Cow, winter change of colour.
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.
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;
secondary sexual characters of;
amphipod, males sexually mature while young;
auditory hairs of.
Crystal worn in the lower lip by some Central African women.
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
on the Scotch deerhound;
on sexual preference in dogs.
Curculionidae, sexual difference in length of snout in some;
hornlike processes in male;
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;
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 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 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.
Cynopithecus niger, ear of.
Cypridina, proportions of the sexes in.
Cyprinidae, proportion of the sexes in the.
Cyprinodontidae, sexual differences in the.
Cypris, relation of the sexes in.
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.
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.
De Candolle, Alph., on a case of inherited power of moving the scalp.
Declensions, origin of.
Decoration in birds.
Deer, development of the horns in;
spots of young;
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, Virginian, colour of the, not affected by castration;
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.
Dendrophila frontalis, young of.
Denison, Sir W., manner of ridding themselves of vermin among the
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;
Devil, not believed in by the Fuegians.
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;
Dicrurus macrocercus, change of plumage in.
Didelphis opossum, sexual difference in the colour of.
Differences, comparative, between different species of birds of the same
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.
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;
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;
Dogs, suffering from tertian ague;
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
on the Yuracaras.
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.
Douglas, J.W., on the sexual differences of the Hemiptera;
colours of British Homoptera.
Down, of birds.
Draco, gular appendages of.
Dragon-flies, caudal appendages of male;
relative size of the sexes of;
difference in the sexes of;
want of pugnacity by the male.
Drake, breeding plumage of the.
Dreams, possible source of the belief in spiritual agencies.
Drill, sexual difference of colour in the.
Dromolaea, Saharan species of.
Drongos, racket-shaped feathers in the tails of.
Dryness of climate, supposed influence of, on the colour of the skin.
Duck, harlequin, age of mature plumage in the;
breeding in immature plumage.
Duck, long-tailed, preference of male, for certain females.
Duck, pintail, pairing with a widgeon.
Duck, voice of the;
pairing with a shield-drake;
immature plumage of the.
Duck, wild, sexual differences in the;
speculum and male characters of;
pairing with a pin-tail drake.
Ducks, wild, becoming polygamous under partial domestication;
dogs and cats recognised by.
Dufosse, Dr., sounds produced by fish.
Dugong, nakedness of;
Dujardin, on the relative size of the cerebral ganglia, in insects.
Duncan, Dr., on the fertility of early marriages;
comparative health of married and single.
Dupont, M., on the occurrence of the supra-condyloid foramen in the humerus
Durand, J.P., on causes of variation.
Dureau de la Malle, on the songs of birds;
on the acquisition of an air by blackbirds.
Dutch, retention of their colour by the, in South Africa.
Duty, sense of.
Duvaucel, female Hylobates washing her young.
Dyaks, pride of, in mere homicide.
Dynastes, large size of males of.
Dynastini, stridulation of.
Dytiscus, dimorphism of females of;
grooved elytra of the female.
Eagle, young Cercopithecus rescued from, by the troop.
Eagle, white-headed, breeding in immature plumage.
Eagles, golden, new mates found by.
Ear, motion of the;
external shell of the, useless in man;
rudimentary point of the, in man.
Ears, more variable in men than women;
piercing and ornamentation of the.
Earwigs, parental feeling in.
Echini, bright colours of some.
Echinodermata, absence of secondary sexual characters in.
Ecker, figure of the human embryo;
on the development of the gyri and sulci of the brain;
on the sexual differences in the pelvis in man;
on the presence of a sagittal crest in Australians.
Edentata, former wide range of, in America;
absence of secondary sexual characters in.
Edolius, racket-shaped feathers in.
Edwards, Mr., on the proportion of the sexes in North American species of
Eels, hermaphroditism of.
Egerton, Sir P., on the use of the antlers of deer;
on the pairing of red deer;
on the bellowing of stags.
Eggs, hatched by male fishes.
Egret, Indian, sexes and young of.
Egrets, breeding plumage of;
Ehrenberg, on the mane of the male Hamadryas baboon.
Ekstrom, M., on Harelda glacialis.
Elachista rufocinerea, habits of male.
Eland, development of the horns of the.
Elands, sexual differences of colour in.
Elaphomyia, sexual differences in.
Elaphrus uliginosus, stridulation of.
Elateridae, proportion of the sexes in.
Elephant, rate of increase of the;
nakedness of the;
using a fan;
Indian, forbearance to his keeper;
polygamous habits of the;
pugnacity of the male;
Indian, mode of fighting of the;
male, odour emitted by the;
attacking white or grey horses.
Elevation of abode, modifying influence of.
Elimination of inferior individuals.
Elk, winter change of the.
Elk, Irish, horns of the.
Ellice Islands, beards of the natives.
Elliot, D.G., on Pelecanus erythrorhynchus.
Elliot, R., on the numerical proportion of the sexes in young rats;
on the proportion of the sexes in sheep.
Elliot, Sir W., on the polygamous habits of the Indian wild boar.
Ellis, on the prevalence of infanticide in Polynesia.
Elphinstone, Mr., on local difference of stature among the Hindoos;
on the difficulty of distinguishing the native races of India.
Elytra, of the females of Dytiscus Acilius, Hydroporus.
Emberiza, characters of young.
Emberiza schoeniclus, head-feathers of the male.
Embryo of man;
of the dog.
Embryos of mammals, resemblance of the.
Emotions experienced by the lower animals in common with man;
manifested by animals.
Emu, sexes and incubation of.
Emulation of singing birds.
Endurance, estimation of.
Energy, a characteristic of men.
England, numerical proportion of male and female births in.
Engleheart, Mr., on the finding of new mates by starlings.
English, success of, as colonists.
Entozoa, difference of colour between the males and females of some.
Environment, direct action of the, in causing differences between the
Envy, persistence of.
Eocene period, possible divergence of men during the.
Eolidae, colours of, produced by the biliary glands.
Epeira nigra, small size of the male of.
Ephippiger vitium, stridulating organs of.
Epicalia, sexual differences of colouring in the species of.
Equus hemionus, winter change of.
Erateina, coloration of.
Ercolani, Prof., hermaphroditism in eels.
Erect attitude of man.
Eristalis, courting of.
Eschricht, on the development of hair in man;
on a languinous moustache in a female foetus;
on the want of definition between the scalp and the forehead in some
on the arrangement of the hair in the human foetus;
on the hairiness of the face in the human foetus of both sexes.
Esmeralda, difference of colour in the sexes of.
Esquimaux, their belief in the inheritance of dexterity in seal-catching;
mode of life of.
Estrelda amandava, pugnacity of the male.
Eubagis, sexual differences of colouring in the species of.
Euchirus longimanus, sound produced by.
Eulampis jugularis, colours of the female.
Euler, on the rate of increase in the United States.
Eunomota superciliaris, racket-shaped feathers in the tail of.
Eupetomena macroura, colours of the female.
Euplocamus erythrophthalmus, possession of spurs by the female.
Europe, ancient inhabitants of.
Europeans, difference of, from Hindoos;
hairiness of, probably due to reversion.
Eurostopodus, sexes of.
Eurygnathus, different proportions of the head in the sexes of.
Eustephanus, sexual differences of species of;
Exaggeration of natural characters by man.
Experience, acquisition of, by animals.
Expression, resemblances in, between man and the apes.
Extinction of races, causes of.
Eye, destruction of the;
change of position in;
obliquity of, regarded as a beauty by the Chinese and Japanese.
Eyebrows, elevation of;
development of long hairs in;
eradicated in parts of South America and Africa;
eradication of, by the Indians of Paraguay.
Eyelashes, eradication of, by the Indians of Paraguay.
Eyelids, coloured black, in part of Africa.
Eyes, pillared, of the male of Chloeon;
difference in the colour of, in the sexes of birds.
Eyton, T.C., observations on the development of the horns in the fallow
Eyzies, Les, human remains from.
Fabre, M., on the habits of Cerceris.
Facial bones, causes of modification of the.
Faculties, diversity of, in the same race of men;
diversity of, in animals of the same species;
mental variation of, in the same species;
Fakirs, Indian, tortures undergone by.
Falcon, peregrine, new mate found by.
Falconer, H., on the mode of fighting of the Indian elephant;
on canines in a female deer;
on Hyomoschus aquaticus.
Falkland Islands, horses of.
Fallow-deer, different coloured herds of.
Famines, frequency of, among savages.
Farr, Dr., on the effects of profligacy;
on the influence of marriage on mortality.
Farrar, F.W., on the origin of language;
on the crossing or blending of languages;
on the absence of the idea of God in certain races of men;
on early marriages of the poor;
on the middle ages.
Farre, Dr., on the structure of the uterus.
Fashions, long prevalence of, among savages.
Faye, Prof., on the numerical proportion of male and female births in
Norway and Russia;
on the greater mortality of male children at and before birth.
Feathers, modified, producing sounds;
elongated, in male birds;
barbless and with filamentous barbs in certain birds;
shedding of margins of.
Feeding, high, probable influence of, in the pairing of birds of different
Feet, thickening of the skin on the soles of the;
modification of, in man.
Felis canadensis, throat-ruff of.
Felis pardalis and F. mitis, sexual difference in the colouring of.
Female, behaviour of the, during courtship.
Female birds, differences of.
Females, presence of rudimentary male organs in;
preference of, for certain males;
pursuit of, by males;
occurrence of secondary sexual characters in;
development of male character by.
Females and males, comparative numbers of;
comparative mortality of, while young.
Femur and tibia, proportions of, in the Aymara Indians.
Fenton, Mr., decrease of Maories;
infanticide amongst the Maories.
Ferguson, Mr., on the courtship of fowls.
Fertilisation, phenomena of, in plants;
in the lower animals.
Fertility lessened under changed conditions.
Fevers, immunity of Negroes and Mulattoes from.
Fiber zibethicus, protective colouring of it.
Fick, H., effect of conscription for military service.
Fidelity, in the elephant;
of savages to one another;
Field-slaves, difference of, from house-slaves.
Fiji Archipelago, population of the.
Fiji Islands, beards of the natives;
marriage-customs of the.
Fijians, burying their old and sick parents alive;
estimation of the beard among the;
admiration of, for a broad occiput.
Filial affection, partly the result of natural selection.
Finch, racket-shaped feathers in the tail of a.
Finches, spring change of colour in;
British, females of the.
Fingers, partially coherent, in species of Hylobates.
Finlayson, on the Cochin Chinese.
Fire, use of.
Fischer, on the pugnacity of the male of Lethrus cephalotes.
Fischer, F. Von, on display of brightly coloured parts by monkeys in
Fish, eagerness of male;
proportion of the sexes in;
sounds produced by.
Fishes, kidneys of, represented by Corpora Wolffiana in the human embryo;
male, hatching ova in their mouths;
receptacles for ova possessed by;
relative size of the sexes in;
fresh-water, of the tropics;
protective resemblances in;
change of colour in;
sounds produced by;
continued growth of.
Flamingo, age of mature plumage.
Flexor pollicis longus, similar variation of, in man.
Flies, humming of.
Flints, difficulty of chipping into form.
Florida, Quiscalus major in.
Flounder, coloration of the.
Flower, W.H., on the abductor of the fifth metatarsal in apes;
on the position of the Seals;
on the Pithecia monachu;
on the throat-pouch of the male bustard.
Fly-catchers, colours and nidification of.
Foetus, human, woolly covering of the;
arrangement of the hair on.
Food, influence of, upon stature.
Foot, prehensile power of the, retained in some savages;
prehensile, in the early progenitors of man.
Foramen, supra-condyloid, exceptional occurrence of in the humerus of man;
in the early progenitors of man.
Forbes, D., on the Aymara Indians;
on local variation of colour in the Quichuas;
on the hairlessness of the Aymaras and Quichuas;
on the long hair of the Aymaras and Quichaus.
Forel, F., on white young swans.
Forester, Hon. O.W., on an orphan hawk.
Formica rufa, size of the cerebral ganglia in.
Fossils, absence of, connecting man with the apes.
Fowl, occurrence of spurs in the female;
game, early pugnacity of;
Polish, early development of cranial peculiarities of;
variations in plumage of;
examples of correlated development in the;
domestic, breeds and sub-breeds of.
Fowls, spangled Hamburg;
inheritance of changes of plumage by;
sexual peculiarities in, transmitted only to the same sex;
loss of secondary sexual characters by male;
Polish, origin of the crest in;
period of inheritance of characters by;
development of the comb in;
numerical proportion of the sexes in;
mongrel, between a black Spanish cock and different hens;
pencilled Hamburg, difference of the sexes in;
Spanish, sexual differences of the comb in;
spurred, in both sexes.
Fox, W.D., on some half-tamed wild ducks becoming polygamous, and on
polygamy in the guinea-fowl and canary-bird;
on the proportion of the sexes in cattle;
on the pugnacity of the peacock;
on a nuptial assembly of magpies;
on the finding of new mates by crows;
on partridges living in triplets;
on the pairing of a goose with a Chinese gander.
Foxes, wariness of young, in hunting districts;
Fraser, C., on the different colours of the sexes in a species of Squilla.
Fraser, G., colours of Thecla.
Frere, Hookham, quoting Theognis on selection in mankind.
Fringilla ciris, age of mature plumage in.
Fringilla cyanea, age of mature plumage in.
Fringilla leucophrys, young of.
Fringilla tristis, change of colour in, in spring;
Fringillidae, resemblance of the females of distinct species of.
Frog, bright coloured and distasteful to birds.
temporary receptacles for ova possessed by;
ready to breed before the females;
vocal organs of.
Frontal bone, persistence of the suture in.
Fruits, poisonous, avoided by animals.
Fuegians, difference of stature among the;
power of sight in the;
skill of, in stone-throwing;
resistance of the, to their severe climate;
mental capacity of the;
quasi-religious sentiments of the;
resemblance of, in mental characters, to Europeans;
mode of life of the;