y, i. 46, ii. 86, 151;
dogs of Paraguay, ii. 87;
feral pigs of Buenos Ayres, i. 77;
on the refusal of wild animals to breed in captivity, ii. 149;
on _Dicotyles labiatus_, ii. 150;
sterility of plantigrade carnivora in captivity, ii. 152;
on _Cavia aperea_, ii. 152;
sterility of _Cebus azarae_ in captivity, ii. 153;
abortions produced by wild animals in captivity, ii. 158.
REPRODUCTION, sexual and asexual, contrasted, ii. 361;
unity of forms of, ii. 383;
antagonism of, to growth, ii. 384.
_Reseda odorata_, ii. 237.
RETINITIS, pigmentary, in deaf-mutes, ii. 328.
REVERSION, ii. 28-29, 372-373, 396, 398-402;
in pigeons, ii. 29;
in cattle, ii. 29-30;
in sheep, ii. 30;
in fowls, ii. 31;
in the heartsease, _ibid._;
in vegetables, _ibid._;
in feral animals and plants, ii. 32-34;
to characters derived from a previous cross in man, dogs, pigeons,
pigs, and fowls, ii. 34-35;
{474}
in hybrids, ii. 36;
by bud-propagation in plants, ii. 36-38;
by age in fowls, cattle, &c., ii. 38-39;
caused by crossing, ii. 39-51;
explained by latent characters, ii. 51-56;
producing monstrosities, ii. 57;
producing peloric flowers, ii. 58-60;
of feral pigs to the wild type, i. 77-78;
of supposed feral rabbits to the wild type, i. 104, 111, 115;
of pigeons, in coloration, when crossed, i. 197-202;
in fowls, i. 239-246;
in the silkworm, i. 302;
in the pansy, i. 369;
in a pelargonium, i. 378;
in Chrysanthemums, i. 379;
of varieties of the China rose in St. Domingo, i. 380;
by buds in pinks and carnations, i. 381;
of laciniated varieties of trees to the normal form, i. 382;
in variegated leaves of plants, i. 383-384;
in tulips, i. 386;
of suckers of the seedless barberry to the common form, i. 384;
by buds in hybrids of _Tropaeolum_, i. 392;
in plants, i. 409;
of crossed peloric snapdragons, ii. 71;
analogous variations due to, ii. 349-351.
REYNIER, selection practised by the Celts, ii. 202-203.
RHINOCEROS, breeding in captivity in India, ii. 150.
_Rhododendron_, hybrid, ii. 265.
_Rhododendron ciliatum_, ii. 277.
_Rhododendron Dalhousiae_, effect of pollen of _R. Nuttallii_ upon, i.
400.
RHUBARB, not medicinal when grown in England, ii. 274.
_Ribes grossularia_, i. 354-356, 376.
_Ribes rubrum_, i. 376.
RIBS, number and ch