FOX, sterility of, in captivity.

FOX, S. BEVAN, races of bees.

FOX, W. DARWIN, gestation of the dog. -"Negro" cat. -reversion of sheep in colour. -period of gestation in the pig. -young of the Himalayan rabbit. -crossing of wild and domestic turkeys. -reversion in crossed musk ducks. -spontaneous segregation of varieties of geese. -effects of close interbreeding upon bloodhounds. -deafness of white cats with blue eyes.

FOXHOUNDS.

Fragaria chiloensis.

Fragaria collina.

Fragaria dioica of Duchesne.

Fragaria elatior.

Fragaria grandiflora.

Fragaria vesca.

Fragaria virginiana.

Fraxinus excelsior.

Fraxinus lentiscifolia.

FRIESLAND cattle, probably descended from Bos primigenius.

FRILLBACK pigeon. -Indian.

Fringilla ciris.

Fringilla spinus.

FRIZZLED fowls. -horses.

FROG, polydactylism in the.

FRUIT, seedless.

FRUIT-TREES, varieties of, occurring wild.

FRY, Mr., on fertile hybrid cats. -on feral fowls in Ascension.

FUCHSIAS, origin of. -bud-variation in.

Fuchsia coccinea and fulgens, twin seed produced by crossing.

FUEGIANS, their superstition about killing young water-fowl. -selection of dogs by the. -their comparative estimation of dogs and old women. -their power of distant vision.

FUNGI, parasitic.

FURBRINGER, Dr., on nails of Saurians.

FURCULUM, characters and variations of the, in pigeons. -alteration of, by disuse, in pigeons. -characters of, in fowls.

FUSION of homologous parts.

GAIT, inheritance of peculiarities of.

GALAPAGOS Archipelago, its peculiar fauna and flora.

Galeobdolon luteum, pelorism in.

GALLS.

GALL-GNATS.

GALL-LIKE excrescences not inherited.

GALLINACEOUS birds, restricted range of large. -general fertility of, in captivity.

Gallinula chloropus.

Gallinula nesiotis.

GALLESIO, species of oranges. -hybridisation of oranges. -persistency of races in the peach. -supposed specific distinctions of peach and nectarine. -bizzarria orange. -crossing of red and white carnations. -crossing of the orange and lemon. -effect of foreign pollen on maize. -spontaneous crossing of oranges. -monstrosities a cause of sterility in plants. -seeding of ordinarily seedless fruits. -sterility of the sugar-cane. -tendency of male flowers to become double. -effects of selection in enlarging fruit, etc. -variation of the orange-tree in North Italy. -naturalisation of the orange in Italy.

Gallus aeneus, a hybrid of varius and the domestic fowl.

Gallus bankiva, probable original of domestic fowls. -game-fowl, nearest to. -crossed with G. sonneratii. -its character and habits. -differences of various breeds of fowls from. -occipital foramen of, figured. -skull of, figured. -cervical vertebra of, figured. -furculum of, figured. -reversion to, in crossed fowls. -hybrid of, with G. varius. -number of eggs of.

Gallus ferrugineus.

Gallus furcatus.

Gallus giganteus.

Gallus sonneratii, characters and habits of. -hybrids of.

Gallus stanleyi, hybrids of.

Gallus temminckii, probably a hybrid.

Gallus varius, characters and habits of. -hybrids and probable hybrids of.

GALTON, Mr., fondness of savages for taming animals. -cattle of Benguela. -on hereditary talent. -on Pangenesis.

GAMBIER, Lord, his early cultivation of the pansy.

GAME-FOWL.

GAPES.

GARCILAZO DE LA VEGA, annual hunts of the Peruvian Incas.

GARNETT, Mr., migratory propensities of hybrid ducks.

GARROD, Dr., on hereditary gout.

GARTNER, on the sterility of hybrids. -acquired sterility of varieties of plants when crossed. -sterility in transplanted plants. -and in the lilac in Germany. -mutual sterility of blue and red flowers of the pimpernel. -supposed rules of transmission in crossing plants. -on crossing plants. -on repeated crossing. -absorption of one species by another, when crossed. -crossing of varieties of the pea. -crossing maize. -crossing of species of Verbascum. -reversion in hybrids. -of Cereus. -of Tropaeolum majus and minus. -variability of hybrids. -variable hybrids from one variable parent. -graft hybrid produced by inoculation in the vine. -effect produced by grafts on the stock. -tendency of hybrid plants to produce double flowers. -production of perfect fruit by sterile hybrids. -sexual elective affinity. -self-impotence in Lobelia, Verbascum, Lilium, and Passiflora. -on the action of pollen. -fertilisation of Malva. -prepotency of pollen. -prepotency of transmission in species of Nicotiana. -bud-variation in Pelargonium zonale. -in Oenothera biennis. -in Achillaea millefolium. -effect of manure on the fertility of plants. -on contabescence. -inheritance of plasticity. -villosity of plants.

Charles Darwin

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