The Origin of Species by means of Natural Selection (6th ed) by Charles Darwin (inspirational novels .txt) đź“–
- Author: Charles Darwin
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—instinct of tumbling
—young of
Pigs, black, not affected by the paint-root —modified by want of exercise
Pistil, rudimentary
Plants, poisonous, not affecting certain coloured animals —selection, applied to
—gradual improvement of
—not improved in barbarous countries
—dimorphic
—destroyed by insects
—in midst of range, have to struggle with other plants —nectar of
—fleshy, on seashores
—climbing
—fresh-water, distribution of
—low in scale, widely distributed
Pleuronectidae, their structure
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
—transported by various means
Pollinia, their development
Polyzoa, their avicularia
Poole, Col., on striped hemionus
Potemogeton
Pouchet, on the colours of flat-fish
Prestwich, Mr., on English and French eocene formations Proctotrupes
Proteolepas
Proteus
Psychology, future progress of
Pyrgoma, found in the chalk
Quagga, striped
Quatrefages, M., on hybrid moths
Quercus, variability of
Quince, grafts of
Rabbits, disposition of young
Races, domestic, characters of
Racehorses, Arab
—English
Radcliffe, Dr., the electrical organs of the torpedo Ramond, on plants of Pyrenees
Ramsay, Prof., on subaerial denudation
—on thickness of the British formations —on faults
Ramsay, Mr., on instincts of cuckoo
Ratio of increase
Rats, supplanting each other
—acclimatisation of
—blind, in cave
Rattlesnake
Reason and instinct
Recapitulation, general
Reciprocity of crosses
Record, geological, imperfect
Rengger, on flies destroying cattle
Reproduction, rate of
Resemblance, protective, of insects
—to parents in mongrels and hybrids
Reversion, law of inheritance
—in pigeons, to blue colour
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
Rogers, Prof., Map of N. America
Rudimentary organs
Rudiments important for classification
Rutimeyer, on Indian cattle
Sageret, on grafts
Salamandra atra
Saliva used in nests
Salmons, males fighting, and hooked jaws of Salt-water, how far injurious to seeds
—not destructive to land-shells
Salter, Mr., on early death of hybrid embryos Salvin, Mr., on the beaks of ducks
Saurophagus sulphuratus
Schacht, Prof., on Phyllotaxy
Schiodte, on blind insects
—on flat-fish
Schlegel, on snakes
Schobl, Dr., on the ears of mice
Scott, Mr. J., on the self-sterility of orchids —on the crossing of varieties of verbascum Sea-water, how far injurious to seeds
—not destructive to land-shells
Sebright, Sir J., on crossed animals
Sedgwick, Prof., on groups of species suddenly appearing Seedlings destroyed by insects
Seeds, nutriment in
—winged
—means of dissemination
—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
—objections to term
—natural, has not induced sterility
Sexes, relations of
Sexual characters variable
—selection
Sheep, Merino, their selection
—two sub-breeds, unintentionally produced —mountain, varieties of
Shells, colours of, littoral
—hinges of
—seldom embedded
Shells, fresh-water, long retain the same forms —fresh-water, dispersal of
—of Madeira
—land, distribution of
—land, resisting salt water
Shrew-mouse
Silene, infertility of crosses
Silliman, Prof., on blind rat
Sirenia, their affinities
Sitaris, metamorphosis of
Skulls of young mammals
Slave-making instinct
Smith, Col. Hamilton, on striped horses
Smith, Dr., on the Polyzoa
Smith, Mr. Fred., on slave-making ants
—on neuter ants
Snake with tooth for cutting through egg-shell Somerville, Lord, on selection of sheep
Sorbus, grafts of
Sorex
Spaniel, King Charles’ breed
Specialisation of organs
Species, polymorphic
—dominant
—common, variable
—in large genera variable
—groups of, suddenly appearing
—beneath Silurian formations
—successively appearing
—changing simultaneously throughout the world Spencer, Lord, on increase in size of cattle Spencer, Mr. Herbert, on the first steps in differentiation —on the tendency to an equilibrium in all forces Sphex, parasitic
Spiders, development of
Sports in plants
Sprengel, C.C., on crossing
—on ray-florets
Squalodon
Squirrels, gradations in structure
Staffordshire, heath, changes in
Stag-beetles, fighting
Star fishes, eyes of
—their pedicellariae
Sterility from changed conditions of life —of hybrids
—laws of
—causes of
—from unfavourable conditions
—not induced through natural selection
St. Helena, productions of
St. Hilaire, Aug., on variability of certain plants —on classification
St. John, Mr., on habits of cats
Sting of bee
Stocks, aboriginal, of domestic animals
Strata, thickness of, in Britain
Stripes on horses
Structure, degrees of utility of
Struggle for existence
Succession, geological
—of types in same areas
Swallow, one species supplanting another Swaysland, Mr., on earth adhering to the feet of migratory birds Swifts, nests of
Swim-bladder
Switzerland, lake inhabitants of
System, natural
Tail of giraffe
—of aquatic animals
—prehensile
—rudimentary
Tanais, dimorphic
Tarsi deficient
Tausch, Dr., on umbelliferae
Teeth and hair correlated
—rudimentary, in embryonic calf
Tegetmeier, Mr., on cells of bees
Temminck, on distribution aiding classification Tendrils, their development
Thompson, Sir W., on the age of the habitable world —on the consolidation of the crust of the earth 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
Thylacinus
Tierra del Fuego, dogs of
—plants of
Timber-drift
Time, lapse of
—by itself not causing modification
Titmouse
Toads on islands
Tobacco, crossed varieties of
Tomes, Mr., on the distribution of bats
Transitions in varieties rare
Traquair, Dr., on flat-fish
Trautschold, on intermediate varieties
Trees on islands belong to peculiar orders —with separated sexes
Trifolium pratense
—incarnatum
Trigonia
Trilobites
—sudden extinction of
Trimen, Mr., on imitating-insects
Trimorphism in plants
Troglodytes
Tuco-tuco, blind
Tumbler pigeons, habits of, hereditary
—young of
Turkey-cock, tuft of hair on breast
Turkey, naked skin on head
—young of, instinctively wild
Turnip and cabbage, analogous variations of Type, unity of
Types, succession of, in same areas
Typotherium
Udders enlarged by use
—rudimentary
Ulex, young leaves of
Umbelliferae, flowers and seeds of
—outer and inner florets of
Unity of type
Uria lacrymans
Use, effects of
—under domestication
—in a state of nature
Utility, how far important in the construction of each part Valenciennes, on fresh-water fish
Variability of mongrels and hybrids
Variation, under domestication
—caused by reproductive system being affected by conditions of life —under nature
—laws of
—correlated
Variations appear at corresponding ages
—analogous in distinct species
Varieties, natural
—struggle between
—domestic, extinction of
—transitional, rarity of
Varieties, when crossed
—fertile
—sterile
—classification of
Verbascum, sterility of
—varieties of, crossed
Verlot, M., on double stocks
Verneuil, M. de, on the succession of species Vibracula of the Polyzoa
Viola, small imperfect flowers of
—tricolor
Virchow, on the structure of the crystalline lens Virginia, pigs of
Volcanic islands, denudation of
Vulture, naked skin on head
Wading-birds
Wagner, Dr., on Cecidomyia
Wagner, Moritz, on the importance of isolation Wallace, Mr., on origin of species
—on the limit of variation under domestication —on dimorphic lepidoptera
—on races in the Malay Archipelago
—on the improvement of the eye
—on the walking-stick insect
—on laws of geographical distribution
—on the Malay Archipelago
—on mimetic animals
Walsh, Mr. B.D., on phytophagic forms
—on equal variability
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 rarity of intermediate varieties
—on Alpine plants
—on convergence
—on the indefinite multiplication of species Weale, Mr., on locusts transporting seeds Web of feet in water-birds
Weismann, Prof., on the causes of variability —on rudimentary organs
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
Wheat, varieties of
White Mountains, flora of
Whittaker, Mr., on lines of escarpment
Wichura, Max, on hybrids
Wings, reduction of size
—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 shells in Madeira Wollaston, Mr., on colours of insects on seashore —on wingless beetles
—on rarity of intermediate varieties
—on insular insects
—on land-shells of Madeira naturalised
Wolves, varieties of
Woodcock with earth attached to leg
Woodpecker, habits of
—green colour of
Woodward, Mr., on the duration of specific forms —on Pyrgoma
—on the continuous succession of genera —on the succession of types
World, species changing simultaneously throughout Wright, Mr. Chauncey, on the giraffe
—on abrupt modifications
Wrens, nest of
Wyman, Prof., on correlation of colour and effects of poison —on the cells of the bee
Youatt, Mr., on selection
—on sub-breeds of sheep
—on rudimentary horns in young cattle
Zanthoxylon
Zebra, stripes on
Zeuglodons
End of Project Gutenberg Etext Origin of Species, 6th Edition, by Darwin
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