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; cuckoo-; development of the comb in; numerical proportion of the sexes in; courtship of; 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; black.
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 cannabina.
Fringilla ciris, age of mature plumage in.
Fringilla cyanea, age of mature plumage in.
Fringilla leucophrys, young of.
Fringilla spinus.
Fringilla tristis, change of colour in, in spring; young of.
Fringillidae, resemblance of the females of distinct species of.
Frog, bright coloured and distasteful to birds.
Frogs, male; temporary receptacles for ova possessed by; ready to breed before the females; fighting of; 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; aversion of, to hair on the face; said to admire European women.
Fulgoridae, songs of the.
Fur, whiteness of, in Arctic animals in winter.
Fur-bearing animals, acquired sagacity of.
Gallicrex, sexual difference in the colour of the irides in.
Gallicrex cristatus, pugnacity of male; red carbuncle occurring in the male during the breeding-season.
Gallinaceae, frequency of polygamous habits and of sexual differences in the; love-gestures of; decomposed feathers in; stripes of young; comparative sexual differences between the species of; plumage of.
Gallinaceous birds, weapons of the male; racket-shaped feathers on the heads of.
Gallinula chloropus, pugnacity of the male.
Galloperdix, spurs of; development of spurs in the female.
Gallophasis, young of.
Galls.
Gallus bankiva, neck-hackles of.
Gallus Stanleyi, pugnacity of the male.
Galton, Mr., on hereditary genius; gregariousness and independence in animals; on the struggle between the social and personal impulses; on the effects of natural selection on civilised nations; on the sterility of sole daughters; on the degree of fertility of people of genius; on the early marriages of the poor; on the ancient Greeks; on the Middle Ages; on the progress of the United States; on South African notions of beauty.
Gammarus, use of the chelae of.
Gammarus marinus.
Gannets, white only when mature.
Ganoid fishes.
Gaour, horns of the.
Gap between man and the apes.
Gaper, sexes and young of.
Gardner, on an example of rationality in a Gelasimus.
Garrulus glandarius.
Gartner, on sterility of hybrid plants.
Gasteropoda, pulmoniferous, courtship of.
Gasterosteus, nidification of.