0, 264;
on the origin of the dog, i. 16;
variation in dogs, i. 33;
crossing of dog and jackal, i. 25;
origin of domestic cats, i. 43;
origin of Angora cat, i. 45;
on wild horses, i. 52, 60;
on Persian sheep, i. 94;
on Siberian fat-tailed sheep, ii. 279;
on Chinese sheep, ii. 315;
on Crimean varieties of the vine, i. 333;
on a grape with rudimentary seeds, ii. 316;
on feral musk-ducks, ii. 46;
sterility of Alpine plants in gardens, ii. 163;
selection of white-tailed yaks, ii. 206.
_Paradoxurus_, sterility of species of, in captivity, ii. 151.
PARAGUAY, cats of, i. 46;
cattle of, i. 89;
horses of, ii. 102;
dogs of, ii. 102;
black-skinned domestic fowl of, i. 232.
PARALLEL variation, ii. 348-352.
PARAMOS, woolly pigs of, i. 78.
PARASITES, liability to attacks of, dependent on colour, ii. 228.
PARIAH dog, with crooked legs, i. 17;
resembling the Indian wolf, i. 24.
PARISET, inheritance of handwriting, ii. 6.
PARKER, W. K., number of vertebrae in fowls, i. 266.
PARKINSON, Mr., varieties of the hyacinth, i. 370.
PARKYNS, Mansfield, on _Columba guinea_, i. 183.
PARMENTIER, differences in the nidification of pigeons, i. 178;
on white pigeons, ii. 230.
PARROTS, general sterility of, in confinement, ii. 155;
alteration of plumage of, ii. 280.
PARSNIP, reversion in, ii. 31;
influence of selection on, ii. 201;
experiments on, ii. 277;
wild, enlargement of roots of, by cultivation, i. 326.
PARTHENOGENESIS, ii. 359, 364.
PARTRIDGE, sterility of, in captivity, ii. 156.
PARTURITION, difficult, hereditary, ii. 8.
_Parus major_, ii. 231.
_Passiflora_, self-impotence in species of, ii. 137-138;
contabescence of female organs in, ii. 166.
_Passiflora alata_, fertility of, when grafted, ii. 188.
PASTURE and climate, adaptation of breeds of sheep to, i. 96, 97.
PASTRANA, Julia, peculiarities in the hair and teeth of, ii. 328.
PATAGONIA, crania of pigs from, i. 77.
PATAGONIAN rabbit, i. 105.
{469}
PATERSON, R., on the Arrindy silk moth, ii. 306.
PAUL, W., on the hyacinth, i. 370;
varieties of pelargoniums, i. 378;
improvement of pelargoniums, ii. 216.
_Pavo cristatus_ and _muticus_, hybrids of, i. 290.
_Pavo nigripennis_, i. 290-291.
"PAVODOTTEN-TAUBE," i. 141.
PEACH, i. 336-344;
derived from the almond, i. 337;
stones of, figured, _ibid._;
co