RE, COMTE, on the assumption of a yellow colour by all varieties of maize.

REAUMUR, effect of confinement upon the cock. -fertility of fowls in most climates.

REED, Mr., atrophy of the limbs of rabbits, consequent on the destruction of their nerves.

REGENERATION of amputated parts in man. -in the human embryo. -in the lower vertebrata, insects, and myriapoda.

REGROWTH of amputated joints.

REGNIER, early cultivation of the cabbage by the Celts. -selection practised by the Celts.

REINDEER, individuals recognised by the Laplanders.

REISSEK, experiments in crossing Cytisus purpureus and laburnum. -modification of a Thesium by Oecidium.

RELATIONS, characters of reproduced in children.

RENGGER, occurrence of jaguars with crooked legs in Paraguay. -naked dogs of Paraguay. -feral dogs of La Plata. -on the aguara. -cats of Paraguay. -dogs of Paraguay. -feral pigs of Buenos Ayres. -on the refusal of wild animals to breed in captivity. -on Dicotyles labiatus. -sterility of plantigrade carnivora in captivity. -on Cavia aperea. -sterility of Cebus azarae in captivity. -abortions produced by wild animals in captivity.

REPRODUCTION, sexual and asexual, contrasted. -unity of forms of. -antagonism of, to growth.

Reseda odorata, self-sterility of.

RETINITIS, pigmentary, in deaf-mutes.

REUTER, Herr, potato-grafting.

REVERSION. -in pigeons. -in cattle. -in sheep. -in fowls. -in the heartsease. -in vegetables. -in feral animals and plants. -to characters derived from a previous cross in man, dogs, pigeons, pigs, and fowls. -in hybrids. -by bud-propagation in plants. -by age in fowls, cattle, etc. -partial, from an injury. -caused by crossing. -explained by latent characters. -producing monstrosities. -producing peloric flowers. -of feral pigs to the wild type. -of supposed feral rabbits to the wild type. -of pigeons, in coloration, when crossed. -in fowls. -in the silkworm. -in the pansy. -in a pelargonium. -in Chrysanthemums. -of varieties of the China rose in St. Domingo. -by buds in pinks and carnations. -of laciniated varieties of trees to the normal form. -in variegated leaves of plants. -in tulips. -of suckers of the seedless barberry to the common form. -by buds in hybrids of Tropaeolum. -in plants. -of crossed peloric snapdragons. -analogous variations due to.

RHINOCEROS, breeding in captivity in India.

Rhododendron, hybrid.

Rhododendron ciliatum.

Rhododendron dalhousiae, effect of pollen of R. nuttallii upon.

Ribes grossularia.

Ribes rubrum.

RIBS, number and characters of, in fowls. -characters of, in ducks.

RICE, imperial, of China. -Indian varieties of. -variety of, not requiring water.

RICHARDSON, H.D., on jaw-appendages in Irish pigs. -management of pigs in China. -occurrence of striped young in Westphalian pigs. -on crossing pigs. -on interbreeding pigs. -on selection in pigs.

RICHARDSON, Sir John, observations on the resemblance between North American dogs and wolves. -on the burrowing of wolves. -on the broad feet of dogs, wolves, and foxes in North America. -on North American horses scraping away the snow.

Ricinus, annual in England.

RIEDEL, Dr., on the "Bagadotte" pigeon. -on the Jacobin pigeon. -fertility of hybrid pigeons. -circumcision.

RILEY, on Phylloxera.

RINDERPEST.

RINTOUL, Mr., potato-grafting.

RISSO, on varieties of the orange.

RIVERS, Lord, on the selection of greyhounds.

RIVERS, Mr., persistency of characters in seedling potatoes. -on the peach. -persistency of races in the peach and nectarine. -connection between the peach and the nectarine. -persistency of character in seedling apricots. -origin of the plum. -seedling varieties of the plum. -persistency of character in seedling plums. -bud-variation in the plum. -plum attacked by bullfinches. -seedling apples with surface-roots. -variety of the apple found in a wood. -on roses. -bud-variation in roses. -production of Provence roses from seeds of the moss-rose. -effect produced by grafting on the stock in jessamine. -in the ash. -on grafted hazels. -hybridisation of a weeping thorn. -experiments with the seed of the weeping elm and ash. -variety of the cherry with curled petals.

Charles Darwin

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