The Origin of The Species

Partridge, dirt on feet
Parts greatly developed, variable, degrees of utility of
Parus major
Passiflora
Peaches in United States
Pear, grafts of
Pelargonium, flowers of, sterility of
Peloria
Pelvis of women
Period, glacial
Petrels, habits of
Phasianus, fertility of hybrids
Pheasant, young, wild

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Pictet, Prof., on groups of species suddenly appearing; on rate of organic change; on continuous
succession of genera; on close alliance of fossils in consecutive formations; on embryological
succession
Pierce, Mr., on varieties of wolves
Pigeons with feathered feet and skin between toes; breeds described, and origin of; breeds of, how
produced; tumbler, not being able to get out of egg; reverting to blue colour; instinct of tumbling;
carriers, killed by hawks; young of
Pistil, rudimentary
Plants, poisonous, not affecting certain coloured animals; selection applied to; gradual
improvement of; not improved in barbarous countries; destroyed by insects; in midst of range, have
to struggle with other plants; nectar of; fleshy, on sea-shores; fresh-water, distribution of; low in
scale; widely distributed
Plumage, laws of change in sexes of birds
Plums in the United States
Pointer dog, origin of; habits of
Poison not affecting certain coloured animals
Poison, similar effect of, on animals and plants
Pollen of fir-trees
Poole, Col., on striped hemionus
Prestwich, Mr., on English and French eocene formation
Primrose; sterility of
Primula, varieties of
Proteolepas
Proteus
Psychology, future progress of
Quagga, striped
Quince, grafts of

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Rabbit, disposition of young
Race-horses, Arab; English
Races, domestic, characters of
Ramond on plants of Pyrenees
Ramsay, Prof., on thickness of the British formations; on faults
Ratio of increase
Rats, supplanting each other; acclimatisation of; blind in cave
Rattle-snake
Reason and instinct
Recapitulation, general
Reciprocity of crosses
Record, geological, imperfect
Rengger on flies destroying cattle
Resemblance to parents in mongrels and hybrids
Reversion, law of inheritance
Rhododendron, sterility of
Richard, Prof., on Aspicarpa
Richardson, Sir J., on structure of squirrels; on fishes of the southern hemisphere
Robinia, grafts of
Rodents, blind
Rudimentary organs
Rudiments important for classification
Sageret on grafts

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Salmons, males fighting, and hooked jaws of
Salt-water, how far injurious to seeds
Saurophagus sulphuratus
Schiodte on blind insects
Schlegel on snakes
Sea-water, how far injurious to seeds
Sebright, Sir J., on crossed animals; on selection of pigeons
Sedgwick, Prof., on groups of species suddenly appearing
Seedlings destroyed by insects
Seeds, nutriment in; winged; power of resisting salt-water; in crops and intestines of birds; eaten by
fish; in mud; hooked, on islands
Selection of domestic products, principle not of recent origin; unconscious; natural; sexual; natural,
circumstances favourable to
Sexes, relations of
Sexual characters variable; selection
Sheep, Merino, their selection; two sub-breeds unintentionally produced; mountain, varieties of
Shells, colours of, littoral, seldom embedded; fresh-water, dispersal of; of Madeira; land,
distribution of
Silene, fertility of crosses
Silliman, Prof., on blind rat
Skulls of young mammals
Slave-making instinct
Smith, Col. Hamilton, on striped horses; Mr. Fred., on slave-making ants; Mr., of Jordan Hill, on
degradation of coast-rocks
Snap-dragon
Somerville, Lord, on selection of sheep

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Sorbus, grafts of
Spaniel, King Charles's breed
Species, groups of, suddenly appearing; beneath Silurian formations; successively appearing;
changing simultaneously throughout the world
Spencer, Lord, on increase in size of cattle
Sphex, parasitic
Spiders, development of
Spitz-dog crossed with fox
Sports in plants
Sprengel, C.C., on crossing; on ray-florets
Squirrels, gradations in structure
Staffordshire, heath, changes in
Stag-beetles, fighting
Sterility from changed conditions of life; of hybrids; laws of; causes of; from unfavourable
conditions; of certain varieties
St. Helena, productions of
St. Hilaire, Aug., on classification
St. John, Mr., on habits of cats
Sting of bee
Stocks, aboriginal, of domestic animal
Strata, thickness of, in Britain
Stripes of horses
Swallow, one species supplanting another
Swim-bladder

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Tail of giraffe; of aquatic animals; rudimentary
Tarsi deficient
Tausch on umbelliferous flowers
Teeth and hair correlated; embryonic, traces of, in birds; rudimentary, in embryonic calf
Tegetmeier, Mr., on cells of bees
Temminck on distribution aiding classification
Thouin on grafts
Thrush, aquatic species of; mocking, of the Galapagos; young of, spotted; nest of
Thuret, M., on crossed fuci
Thwaites, Mr., on acclimatisation
Tierra del Fuego, dogs of; plants of
Timber-drift
Time, lapse of
Titmouse
Toads on islands
Tobacco, crossed varieties of
Tomes, Mr., on the distribution of bats
Transitions in varieties
Trees on islands belong to peculiar orders; with separated sexes
Trifolium pratense; incarnatum
Trigonia
Trilobites; sudden extinction of
Troglodytes
Tucutucu, blind

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Tumbler pigeons, habits of, hereditary; young of
Turkey-cock, brush of hair on breast
Turkey, naked skin on head; young, wild
Turnip and cabbage, analogous variations of
Type, unity of
Types, succession of, in same areas
Udders enlarged by use; rudimentary
Ulex, young leaves of
Umbelliferae, outer and inner florets of
Unity of type
Use, effects of, under domestication
Utility, how far important in the construction of each part
Valenciennes on fresh-water fish
Variability of mongrels and hybrids
Variations appear at corresponding ages; analogous in distinct species
Varieties, natural; struggle between; domestic, extinction of; transitional; when crossed, fertile;
when crossed, sterile; classification of
Verbascum, sterility of; varieties of, crossed
Verneuil, M. de, on the succession of species
Viola tricolor
Volcanic islands, denudation of
Vulture, naked skin on head
Wading-birds
Wallace, Mr., on origin of species; on law of geographical distribution; on the Malay Archipelago

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Wasp, sting of
Water, fresh, productions of
Water-hen
Waterhouse, Mr., on Australian marsupials; on greatly developed parts being variable; on the cells
of bees; on general affinities
Water-ouzel
Watson, Mr. H.C., on range of varieties of British plants; on acclimatisation; on flora of Azores; on
Alpine plants; on rarity of intermediate varieties
Weald, denudation of
Web of feet in water-birds
West Indian islands, mammals of
Westwood on species in large genera being closely allied to others; on the tarsi of Engidae; on the
antennae of hymenopterous insects
Whales, fossil
Wheat, varieties of
White Mountains, flora of
Wings, reduction of size
Wings of insects homologous with branchiae; rudimentary, in insects
Wolf crossed with dog; of Falkland Isles
Wollaston, Mr., on varieties of insects; on fossil varieties of land-shells in Madeira; on colours of
insects on sea-shore; on wingless beetles; on rarity of intermediate varieties; on insular insects; on
land-shells of Madeira, naturalised
Wolves, varieties of
Woodpecker, habits of; green colour of
Woodward, Mr., on the duration of specific forms; on the continuous succession of genera; on the
succession of types

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World, species changing simultaneously throughout
Wrens, nest of
Youatt, Mr., on selection, on sub-breeds of sheep; on rudimentary horns in young cattle
Zebra, stripes on 

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