PACA, sterility of the, in confinement, 4.
PACIFIC Islands, pigs of the, 3.
PADUA, earliest known flower-garden at, 20.
PADUAN fowl of Aldrovandi, 7.
Pæonia moutan, 20.
PÆONY-TREE, ancient cultivation of, in China, 20.
PAGET, on the Hungarian sheep-dog, 1.
PAGET, Sir J., inheritance of cancer, 12;
—hereditary elongation of hairs in the eyebrow, 12;
—regrowth of extra digits, 12;
—circumcision, 12;
—period of inheritance of cancer, 14;
—on Hydra, 24;
—on the healing of wounds, 24;
—on the reparation of bones, 24;
—growth of hair near inflamed surfaces or fractures, 24;
—on false membranes, 24;
—compensatory development of the kidney, 24;
—bronzed skin in disease of supra-renal capsules, 25;
—unity of growth and gemmation, 27;
—independence of the elements of the body, 27;
—affinity of the tissues for special organic substances, 27.
PALLAS, on the influence of domestication upon the sterility of intercrossed species, 1, 4, 6, 16;
—hypothesis that variability is wholly due to crossing, 4, 8, 22 (2);
—on the origin of the dog, 1;
—variation in dogs, 1;
—crossing of dog and jackal, 1;
—origin of domestic cats, 2;
—origin of Angora cat, 1;
—on wild horses, 2 (2);
—on Persian sheep, 3;
—on Siberian fat-tailed sheep, 23;
—on Chinese sheep, 24;
—on Crimean varieties of the vine, 10;
—on a grape with rudimentary seeds, 24;
—on feral musk-ducks, 13;
—sterility of Alpine plants in gardens, 18;
—selection of white-tailed yaks, 20.
PAMPAS, feral cattle on the, 3.
Pandanus, 22.
PANGENESIS, hypothesis of, 27.
Panicum, seeds of, used as food, 9;
—found in the Swiss lake-dwellings, 9.
PANSY, 10.
PAPPUS, abortion of the, in Carthamus, 24.
Paradoxurus, sterility of species of, in captivity, 18.
PARAGUAY, cats of, 1;
—cattle of, 3;
—horses of, 3;
—dogs of, 3;
—black-skinned domestic fowl of, 7.
PARALLEL variation, 26.
PARAMOS, woolly pigs of, 3.
PARASITES, liability to attacks of, dependent on colour, 21.
PARIAH dog, with crooked legs, 1;
—resembling the Indian wolf, 1.
PARISET, inheritance of handwriting, 13.
Paritium tricuspis, bud-variation, 11.
PARKER, W. K., number of vertebræ in fowls, 7.
PARKINSON, Mr., varieties of the hyacinth, 10.
PARKYNS, MANSFIELD, on Columba guinea, 6.
PARMENTIER, differences in the nidification of pigeons, 5;
—on white pigeons, 21.
PARROTS, general sterility of, in confinement, 18;
—alteration of plumage of, 23.
PARSNIP, reversion in, 13;
—influence of selection on, 20;
—experiments on, 23;
—wild, enlargement of roots of, by cultivation, 9.
PARTHENOGENESIS, 27 (2).
PARTRIDGE, sterility of, in captivity, 18.
PARTURITION, difficult, hereditary, 12.
Parus major, 21.
Passiflora, self-impotence in species of, 17 (2);
—contabescence of female organs in, 18.
Passiflora alata, fertility of, when grafted, 19.
PASTRANA, Julia, peculiarities in the hair and teeth of, 25.
PASTURE and climate, adaptation of breeds of sheep to, 3 (2).
PATAGONIA, crania of pigs from, 3.
PATAGONIAN rabbit, 4.
PATERSON, R., on the Arrindy silk-moth, 24.
PAUL, W., on the hyacinth, 10 (2);
—varieties of pelargoniums, 11;
—weakness of transmission in hollyhocks, 14;
—improvement of pelargoniums, 20.
Pavo cristatus and muticus, hybrids of, 8.
Pavo nigripennis, 8.
“PAVODOTTEN-TAUBE,” 5.
PEACH, 10;
—derived from the almond, 10;
—stones of, figured, 10;
—contrasted with almonds, 10;
—double-flowering, 10 (3);
—hybrids of, 10;
—persistency of races of, 10;
—trees producing nectarines, 10;
—variation in, 10 (2);
—bud-variation in, 11;
—pendulous, 12;
—variation by selection in, 20;
—peculiar disease of the, 21;
—glands on the leaves of the, 21;
—antiquity of the, 24;
—increased hardiness of the, 24;
—varieties of, adapted for forcing, 24;
—yellow-fleshed, liable to certain diseases, 25.
PEACH-ALMOND, 27.
PEAFOWL, origin of, 8;
—japanned or black-shouldered, 8;
—feral, in Jamaica, 6;
—comparative fertility of, in wild and tame states, 16, 22;
—white, 25.
PEARS, 10;
—bud-variation in, 11;
—reversion in seedling, 13;
—inferiority of, in Pliny’s time, 20;
—winter nelis, attacked by aphides, 21;
—soft-barked varieties of, attacked by wood-boring beetles, 21;
—origination of good varieties of, in woods, 22;
—Forelle, resistance of, to frost, 24.
PEAS, 9;
—origin of, 9;
—varieties of, 9;
—found in Swiss lake-dwellings, 9 (3);
—fruit and seeds figured, 9;
—persistency of varieties, 9;
—intercrossing of varieties, 9, 11;
—effect of crossing on the female organs in, 11;
—double-flowered, 18;
—maturity of, accelerated by selection, 20;
—varieties of, produced by selection, 20;
—thin-shelled, liable to the attacks of birds, 21;
—reversion of, by the terminal seed in the pod, 26.
PECCARY, breeding of the, in captivity, 18.
PEDIGREES of horses, cattle, greyhounds, game-cocks, and pigs, 12.
PEGU, cats of, 1;
—horses of, 2.
PELARGONIUMS, multiple origin of, 10;
—zones of, 10;
—bud-variation in, 11;
—variegation in, accompanied by dwarfing, 11;
—pelorism in, 18, 26;
—by reversion, 13;
—advantage of change of soil to, 18;
—improvement of, by selection, 20;
—scorching of, 21;
—numbers of, raised from seed, 21;
—effects of conditions of life on, 23;
—stove-variety of, 24;
—correlation of contracted leaves and flowers in, 25 (2).
Pelargonium fulgidum, conditions of fertility in, 18.
“PELONES,” a Columbian breed of cattle, 3, 6.
PELORIC flowers, tendency of, to acquire the normal form, 14;
—fertility or sterility of, 18 (2).
PELORIC races of Gloxinia speciosa and Antirrhinum majus, 10.
PELORISM, 13, 26 (2).
PELVIS, characters of, in rabbits, 4;
—in pigeons, 5;
—in fowls, 7;
—in ducks, 8.
PEMBROKE cattle, 3.
PENDULOUS trees, 10, 26;
—uncertainty of transmission of, 12 (2).
PENGUIN ducks, 8 (2);
—hybrid of the, with the Egyptian goose, 8.
PENNANT, production of wolf-like curs at Fochabers, 1;
—on the Duke of Queensberry’s wild cattle, 3.
Pennisetum, seeds of, used as food in the Punjab, 9.
Pennisetum distichum, seeds of, used as food in Central Africa, 9.
PERCIVAL, Mr., on inheritance in horses, 12;
—on horn-like processes in horses, 2.
Perdix rubra, occasional fertility of, in captivity, 18.
PERIOD of action of causes of variability, 22.
PERIOSTEUM of a dog, producing bone in a rabbit, 27.
PERIWINKLE, sterility of, in England, 19.
PERSIA, estimation of pigeons in, 6;
—carrier pigeon of, 5;
—tumbler pigeon of, 5;
—cats of, 1;
—sheep of, 3.
PERSISTENCE of colour in horses, 2;
—of generic peculiarities, 4.
PERU, antiquity of maize in, 9;
—peculiar potato from, 9;
—selection of wild animals practised by the Incas of, 20 (2).
“PERUCKEN-TAUBE,” 5.
PETALS, rudimentary, in cultivated plants, 24;
—producing pollen, 27.
PETUNIAS, multiple origin of, 10.
PEYRITSCH, Dr., vegetable teratology, 13.
“PFAUEN-TAUBE,” 5.
Phalænopsis, pelorism in, 26.
PHALANGES, deficiency of, 14.
Phaps chalcoptera, 26.
Phaseolus multiflorus, 24, 25.
Phaseolus vulgaris, 9, 24.
Phasianus pictus, 7.
Phasianus amherstiæ, 7.
PHEASANT, assumption of male plumage by the hen, 13;
—wildness of hybrids of, with the common fowl, 13;
—prepotency of the, over the fowl, 14;
—diminished fecundity of the, in captivity, 18.
PHEASANTS, golden and Lady Amherst’s, 7.
PHEASANT-FOWLS, 7.
PHILIPEAUX, regeneration of limbs in the salamander, 27.
PHILIPPAR, on the varieties of wheat, 9.
PHILIPPINE Islands, named breeds of game fowl in the, 7.
PHILLIPS, Mr., on bud-variation in the potato, 11.
Phlox, bud-variation by suckers in, 11.
PHTHISIS, affection of the fingers in, 25.
PHYLLOXERA, 10.
PICKERING, Dr., on the grunting voice of humped cattle, 3;
—occurrence of the head of a fowl in an ancient Egyptian procession, 7;
—seeding of ordinarily seedless fruits, 18;
—extinction of ancient Egyptian breeds of sheep and oxen, 28;
—on an ancient Peruvian gourd, 28.
PICOTEES, effect of conditions of life on, 23.
PICTET, A., oriental names of the pigeon, 6.
PICTET, Prof., origin of the dog, 1;
—on fossil oxen, 3.
PIEBALDS, probably due to reversion, 13.
PIÉTREMENT, M., on the ribs of horses, 2.
PIGEAUX, hybrids of the hare and rabbit, 18.
PIGEON à cravate, 5.
PIGEON bagadais, 5 (2).
PIGEON coquille, 5.
PIGEON cygne, 5.
PIGEON heurté, 5.
PIGEON pattu plongeur, 5.
PIGEON polonais, 5.
PIGEON romain, 5 (2).
PIGEON tambour, 5.
PIGEON turc, 5.
PIGEONS, origin of, 5 (2), 6;
—classified table of breeds of, 5;
—pouter, 5;
—carrier, 5;
—runt, 5;
—barbs, 5;
—fantail, 5;
—turbit and owl, 5;
—tumbler, 5;
—Indian frill-back, 5;
—Jacobin, 5;
—trumpeter, 5;
—other breeds of, 5;
—differences of, equal to generic, 5;
—individual variations of, 5;
—variability of peculiarities characteristic of breeds in, 5;
—sexual variability in, 5 (2);
—osteology of, 5;
—correlation of growth in, 5, 25;
—young of some varieties naked when hatched, 5, 25;
—effects of disuse in, 5;
—settling and roosting in trees, 6;
—floating in the Nile to drink, 6;
—dovecot, 6 (2);
—arguments for unity of origin of, 6;
—feral, in various places, 6, 13;
—unity of coloration in, 6;
—reversion of mongrel, to coloration of C. livia, 6;
—history of the cultivation of, 6;
—history of the principal races of, 6;
—mode of production of races of, 6;
—reversion in, 13;
—by age, 13;
—produced by crossing in, 13 (2);
—prepotency of transmission of characters in breeds of, 14 (2);
—sexual differences in some varieties of, 14;
—period of perfect plumage in, 14;
—effect of segregation on, 15;
—preferent pairing of, within the same breed, 16;
—fertility of, increased by domestication, 16, 18;
—effects of interbreeding and necessity of crossing, 17;
—indifference of, to change of climate, 18;
—selection of, 16, 20 (2);
—among the Romans, 20;
—unconscious selection of, 20 (2);
—facility of selection of, 21;
—white, liable to the attacks of hawks, 21;
—effects of disuse of parts in, 24;
—fed upon meat, 24;
—effect of first male upon the subsequent progeny of the female, 11;
—homology of the leg and wing feathers in, 25;
—union of two outer toes in feather-legged, 25;
—correlation of beak, limbs, tongue, and nostrils, 25;
—analogous variation in, 26 (2);
—permanence of breeds of, 28.
PIGS, of Swiss lake-dwellings, 3;
—types of, derived from Sus scrofa and Sus indicus, 3;
—Japanese (Sus pliciceps, Gray), figured, 3;
—of Pacific Islands, 3, 15;
—modifications of skull in, 3;
—length of intestines in, 3, 24;
—period of gestation of, 3;
—number of vertebræ and ribs in, 3;
—anomalous forms, 3 (2);
—development of tusks and bristles in, 3;
—striped young of, 3;
—reversion of feral, to wild type, 3 (2), 13 (2);
—production and changes of breeds of, by intercrossing, 3;
—effects produced by the first male upon the subsequent progeny of the female, 11;
—pedigrees of, 12;
—polydactylism in, 12;
—cross-reversion in, 13;
—hybrid, wildness of, 13;
—disappearance of tusks in male under domestication, 14;
—solid-hoofed, 28;
—crosses of, 15 (2);
—mutual fertility of all varieties of, 16;
—increased fertility by domestication, 16;
—ill effects of close interbreeding in, 17 (2);
—influence of selection on, 20;
—prejudice against certain colours in, 20, 21, 25;
—unconscious selection of, 20;
—black Virginian, 21, 25;
—similarity of the best breeds of, 21;
—change of form in, 23;
—effects of disuse of parts in, 24;
—ears of, 24;
—correlations in, 25;
—white buck-wheat injurious to, 25;
—tail of, grafted upon the back, 27;
—extinction of the older races of, 28.
PIMENTA, 15.
PIMPERNEL, 19.
PINE-APPLE, sterility and variability of the, 22.
PINK, Chinese, 25.
PINKS, bud-variation in, 11;
—improvement of, 20.
Pinus pumilio, mughus, and nana, varieties of P. sylvestris, 10.
Pinus sylvestris, 10, 24;
—hybrids of, with P. nigricans, 17.
PIORRY, on hereditary disease, 12, 14.
Pistacia lentiscus, 23.
Pistacia vera, 11.
PISTILS, rudimentary, in cultivated plants, 24.
PISTOR, sterility of some mongrel pigeons, 6;
—fertility of pigeons, 16.
Pisum arvense and sativum, 9.
PITYRIASIS versicolor, inheritance of, 14.
PLANCHON, G., on a fossil vine, 10;
—sterility of Jussiæa grandiflora in France, 18.
PLANE-TREE, variety of the, 10.
PLANTIGRADE carnivora, general sterility of the, in captivity, 18.
PLANTS, progress of cultivation of, 9 (2);
—cultivated, their geographical derivation, 9;
—crossing of, 15, 17;
—comparative fertility of wild and cultivated, 16;
—self-impotent, 17;
—dimorphic and trimorphic, 17;
—sterility of, from changed conditions, 18;
—from contabescence of anthers, 18 (2);
—from monstrosities, 9 (2);
—from doubling of the flowers, 18 (2);
—from seedless fruit, 18;
—from excessive development of vegetative organs, 18;
—influence of selection on, 20;
—variation by selection, in useful parts of, 20;
—variability of, 21;
—variability of, induced by crossing, 22;
—direct action of change of climate on, 23;
—change of period of vegetation in, 24;
—varieties of, suitable to different climates, 24;
—correlated variability of, 25;
—antiquity of races of, 28.
PLASTICITY, inheritance of, 21.
PLATEAU, F., on the vision of amphibious animals, 20.
Platessa flesus, , 13.
PLATO, notice of selection in breeding dogs by, 20.
PLICA polonica, 23.
PLINY, on the crossing of shepherd dogs with the wolf, 1;
—on Pyrrhus’ breed of cattle, 20;
—on the estimation of pigeons among the Romans, 6;
—pears described by, 20.
PLUM, 10;
—stones figured, 10;
—varieties of the, 10 (2), 20;
—bud-variation in the, 11;
—peculiar disease of the, 21;
—flower-buds of, destroyed by bullfinches, 21;
—purple-fruited, liable to certain diseases, 25.
PLUMAGE, inherited peculiarities of, in pigeons, 5 (2);
—sexual peculiarities of, in fowls, 7.
PLURALITY of races, Pouchet’s views on, 1.
Poa, seeds of, used as food, 9;
—species of, propagated by bulblets, 18.
PODOLIAN cattle, 3.
POINTERS, modification of, 1;
—crossed with the foxhound, 3.
POIS sans parchemin, 21.
POITEAU, origin of Cytisus adami, 11;
—origin of cultivated varieties of fruit-trees, 22.
POLISH fowl, 7 (6);
—skull figured, 7;
—section of skull figured, 7;
—development of protuberance of skull, 7;
—furculum figured, 7.
POLISH, or Himalayan rabbit, 4.
POLLEN, 27 (2);
—action of, 16;
—injurious action of, in some orchids, 17 (2);
—resistance of, to injurious treatment, 18;
—prepotency of, 19.
POLLOCK, Sir F., transmission of variegated leaves in Ballota nigra, 11;
—on local tendency to variegation, 23.
POLYANTHUS, 12.
POLYDACTYLISM, inheritance of, 12;
—significance of, 12.
PONIES, most frequent on islands and mountains, 2;
—Javanese, 2.
POOLE, Col., on striped Indian horses, 2 (2);
—on the young of Asinus indicus, 13.
POPLAR, Lombardy, 10.
PÖPPIG, on Cuban wild dogs, 1.
POPPY, found in the Swiss lake-dwellings, 9 (2);
—with the stamens converted into pistils, 10;
—differences of the, in different parts of India, 18;
—monstrous, fertility of, 18;
—black-seeded, antiquity of, 28.
PORCUPINE, breeding of, in captivity, 18.
PORCUPINE family, 12, 14.
Porphyrio, breeding of a species of, in captivity, 18.
PORTAL, on a peculiar hereditary affection of the eye, 12.
PORTO Santo, feral rabbits of, 4.
Portulaca oleracea, 23.
Potamochoerus penicillatus, 18.
POTATO, 9 (2);
—bud-variation by tubers in the, 11 (2);
—graft-hybrid of, by union of half-tubers, 11;
—individual self-impotence in the, 17;
—sterility of, 18;
—advantage of change of soil to the, 18.
POTATO, sweet, sterility of the, in China, 18;
—varieties of the, suited to different climates, 24.
POUCHET, M., his views on plurality of races, 1.
POUTER pigeons, 5;
—furculum figured, 5;
—history of, 6.
POWIS, Lord, experiments in crossing humped and English cattle, 3, 13.
POYNTER, Mr., on a graft-hybrid rose, 11.
PRAIRIE wolf, 1.
PRECOCITY of highly-improved breeds, 25.
PREPOTENCY of pollen, 19.
PREPOTENCY of transmission of character, 14, 19;
—in the Austrian emperors and some Roman families, 14;
—in cattle, 14 (2);
—in sheep, 14;
—in cats, 14;
—in pigeons, 14;
—in fowls, 14;
—in plants, 14;
—in a variety of the pumpkin, 10;
—in the jackal over the dog, 14;
—in the ass over the horse, 14;
—in the pheasant over the fowl, 14;
—in the penguin duck over the Egyptian goose, 14;
—discussion of the phenomena of, 14.
PRESCOTT, Mr., on the earliest known European flower-garden, 20.
PRESSURE, mechanical, a cause of modification, 26 (2).
PREVOST and Dumas, on the employment of several spermatozoids to fertilise one ovule, 27.
PREYER, Prof., on the effect of circumcision, 12.
PRICE, Mr., variations in the structure of the feet in horses, 2.
PRICHARD, Dr., on polydactylism in the negro, 12;
—on the Lambert family, 14;
—on an albino negro, 21;
—on Plica polonica, 23.
PRIMROSE, 28;
—double, rendered single by transplantation, 18.
Primula, intercrossing of species of, 10;
—contabescence in, 18;
—‘hose in hose,’ 10;
—with coloured calyces, sterility of, 18.
Primula sinensis, variations, 10;
—reciprocally dimorphic, 17.
Primula veris, 12, 16.
Primula vulgaris, 12, 16.
PRINCE, Mr., on the intercrossing of strawberries, 27.
PRINGSHEIM, on conjugation, 27.
Procyon, sterility of, in captivity, 18.
PROLIFICNESS, increased by domestication, 19.
PROTOZOA, reproduction of the, 27.
Prunus armeniaca, 10 (2).
Prunus avium, 10.
Prunus cerasus, 10 (2).
Prunus domestica, 10.
Prunus insititia, 10.
Prunus spinosa, 10.
PRUSSIA, wild horses in, 2.
Psittacus erithacus, 18.
Psittacus macoa, 18.
Psophia, general sterility of, in captivity, 18.
PTARMIGAN fowls, 7.
Pulex penetrans, 23.
PUMPKINS, 10.
PUNO ponies of the Cordillera, 2.
PUSEY, Mr., value of crossbred sheep, 17;
—preference of hares and rabbits for common rye, 21.
PUTSCHE and Vertuch, varieties of the potato, 9.
PUVIS, effects of foreign pollen on apples, 11;
—supposed non-variability of monotypic genera, 22.
Pyrrhula vulgaris, 21;
—assumption of the hen-plumage by the male, in confinement, 18.
PYRRHUS, his breed of cattle, 20.
Pyrus, fastigiate Chinese species of, 23.
Pyrus acerba, 10.
Pyrus aucuparia, 21.
Pyrus communis, 10, 11.
Pyrus malus, 10, 11.
Pyrus paradisiaca, 10.
Pyrus præcox, 10.