PRESCOTT, Mr., on the earliest known European flower-garden.
PRESSURE, mechanical, a cause of modification.
PREVOST and Dumas, on the employment of several spermatozoids to fertilise one ovule.
PREYER, Prof., on the effect of circumcision.
PRICE, Mr., variations in the structure of the feet in horses.
PRICHARD, Dr., on polydactylism in the negro. -on the Lambert family. -on an albino negro. -on Plica polonica.
PRIMROSE. -double, rendered single by transplantation.
Primula, intercrossing of species of. -contabescence in. -'hose in hose.' -with coloured calyces, sterility of.
Primula sinensis, variations. -reciprocally dimorphic.
Primula veris.
Primula vulgaris.
PRINCE, Mr., on the intercrossing of strawberries.
PRINGSHEIM, on conjugation.
Procyon, sterility of, in captivity.
PROLIFICNESS, increased by domestication.
PROTOZOA, reproduction of the.
Prunus armeniaca.
Prunus avium.
Prunus cerasus.
Prunus domestica.
Prunus insititia.
Prunus spinosa.
PRUSSIA, wild horses in.
Psittacus erithacus.
Psittacus macoa.
Psophia, general sterility of, in captivity.
PTARMIGAN fowls.
Pulex penetrans.
PUMPKINS.
PUNO ponies of the Cordillera.
PUSEY, Mr., value of crossbred sheep. -preference of hares and rabbits for common rye.
PUTSCHE and Vertuch, varieties of the potato.
PUVIS, effects of foreign pollen on apples. -supposed non-variability of monotypic genera.
Pyrrhula vulgaris. -assumption of the hen-plumage by the male, in confinement.
PYRRHUS, his breed of cattle.
Pyrus, fastigiate Chinese species of.
Pyrus acerba.
Pyrus aucuparia.
Pyrus communis.
Pyrus malus.
Pyrus paradisiaca.
Pyrus praecox.
QUAGGA, previous impregnation by.
QUATREFAGES, A. DE, on the burrowing of a bitch to litter. -selection in the silkworm. -development of the wings in the silk-moth. -on varieties of the mulberry. -special raising of eggs of the silk-moth. -on disease of the silkworm. -on monstrosities in insects. -on a change in the breeding season of the Egyptian goose. -fertilisation of the Teredo. -tendency to similarity in the best races. -on his "tourbillon vital." -on the independent existence of the sexual elements.
Quercus cerris.
Quercus robur and pedunculata, hybrids of.
QUINCE, pears grafted on the.
RABBITS, domestic, their origin. -of Mount Sinai and Algeria. -breeds of. -Himalayan, Chinese, Polish, or Russian. -feral. -of Jamaica. -of the Falkland Islands. -of Porto Santo. -osteological characters of. -discussion of modifications in. -one-eared, transmission of peculiarity of. -reversion in feral. -in the Himalayan. -crossing of white and coloured Angora. -comparative fertility of wild and tame. -falsified experiments in interbreeding of. -high-bred, often bad breeders. -selection of. -white, liable to destruction. -effects of disuse of parts in. -skull of, affected by drooping ears. -length of intestines in. -correlation of ears and skull in. -variations in skull of. -periosteum of a dog producing bone in.
RACEHORSE, origin of.
RACES, modification and formation of, by crossing. -natural and artificial. -Pouchet's views on plurality of. -of pigeons.
RADCLYFFE, W.F., effect of climate and soil on strawberries. -constitutional differences in roses.
RADISHES. -crossing of. -varieties of.
RADLKOFER, retrogressive metamorphosis in mosses and algae.
RAFARIN, M., bud-variation and reversion.
RAFFLES, Sir STAMFORD, on the crossing of Javanese cattle with Bos sondaicus.
RAM, goat-like, from the Cape of Good Hope.
RAMU, M., on appendages to throat of goat.
RANCHIN, heredity of diseases.
RANGE of gallinaceous birds on the Himalaya.
RANKE, on the effects of use and disuse of organs.
Ranunculus ficaria.
Ranunculus repens.
RAPE.
Raphanus caudatus.
Raphanus raphanistrum.
Raphanus sativus.
RASPBERRY, yellow-fruited.
RATTLESNAKE, experiments with poison of the.
RAVEN, stomach of, affected by vegetable diet.
RAWSON, A., self-impotence in hybrids of Gladiolus.