The Origin of The Species

Subject Index
Aberrant groups
Abyssinia, plants of
Acclimatisation
Affinities of extinct species; of organic beings

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Agassiz on Amblyopsis; on groups of species suddenly appearing; on embryological succession; on
the glacial period; on embryological characters; on the embryos of vertebrata; on parallelism of
embryological development and geological succession
Algae of New Zealand
Alligators, males, fighting
Amblyopsis, blind fish
America, North, productions allied to those of Europe; boulders and glaciers of; South, no modern
formations on west coast
Ammonites, sudden extinction of
Anagallis, sterility of
Analog of variations
Ancylus
Animals, not domesticated from being variable; domestic; descended from several stocks;
acclimatisation of; of Australia; with thicker fur in cold climates; blind, in caves; extinct, of
Australia
Anomma
Antarctic islands, ancient flora of
Antirrhinum
Ants attending aphides; slave-making instinct
Ants, neuter, structure of
Aphides attended by ants
Aphis, development of
Apteryx
Arab horses
Aralo-Caspian Sea
Archiac, M. de, on the succession of species

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Artichoke, Jerusalem
Ascension, plants of
Asclepias, pollen of
Asparagus
Aspicarpa
Asses, striped
Ateuchus
Audubon, on habits of frigate-bird; on variation in birds'-nests; on heron eating seeds
Australia, animals of; dogs of; extinct animals of; European plants in
Azara on flies destroying cattle
Azores, flora of
Babington, Mr., on British plants
Balancement of growth
Bamboo with hooks
Barberry, flowers of
Barrande, M., on Silurian colonies; on the succession of species; on parallelism of palaeozoic
formations; on affinities of ancient species
Barriers, importance of
Batrachians on islands
Bats, how structure acquired; distribution of
Bear, catching water-insects
Bee, sting of; queen, killing rivals
Bees fertilizing flowers; hive; not sucking the red clover; cell-making instinct; humble, cells of;
parasitic
Beetles, wingless, in Madeira; with deficient tarsi

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Bentham, Mr., on British plants; on classification
Berkeley, Mr., on seeds in salt-water
Bermuda, birds of
Birds acquiring fear; annually cross the Atlantic; colour of, on continents; fossil, in caves of Brazil;
of Madeira, Bermuda, and Galapagos; song of males; transporting seeds; waders; wingless; with
traces of embryonic teeth
Bizcacha, affinities of
Bladder for swimming in fish
Blindness of cave animals
Blyth, Mr., on distinctness of Indian cattle; on striped Hemionus; on crossed geese
Boar; shoulder-pad of
Borrow, Mr., on the Spanish pointer
Bory St. Vincent, on Batrachians
Bosquet, M., on fossil Chthamalus
Boulders, erratic, on the Azores
Branchiae
Brent, Mr., on house-tumblers; on hawks killing pigeons
Brewer, Dr., on American cuckoo
Britain, mammals of
Bronn, on duration of specific forms
Brown, Robert, on classification
Buckman, on variation in plants
Buzareingues on sterility of varieties
Cabbage, varieties of, crossed

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Calceolaria
Canary-birds, sterility of hybrids
Cape de Verde islands
Cape of Good Hope, plants of
Carrier-pigeons killed by hawks
Cassini on flowers of composita
Catasetum
Cats, with blue eyes, deaf; variation in habits of; curling tail when going to spring
Cattle destroying fir-trees; destroyed by flies in La Plata; breeds of, locally extinct; fertility of
Indian and European breeds
Cave, inhabitants of, blind
Centres of creation
Cephalopodae, development of
Cervulus
Cetacea, teeth and hair
Ceylon, plants of
Chalk formation
Charlock
Checks to increase; mutual
Chickens, instinctive tameness of
Chthamalinae
Chthamalus, cretacean species of
Circumstances favourable to selection of domestic products; to natural selection
Cirripedes capable of crossing; carapace aborted; their ovigerous frena; fossil; larvae of

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Clift, Mr., on the succession of types
Climate, effects of, in checking increase of beings; adaptation of, to organisms
Cobites, intestine of
Cockroach
Collections, palaeontological, poor
Colour, influenced by climate; in relation to attacks by flies
Columba livia, parent of domestic pigeons
Colymbetes
Compositae, outer and inner florets of; male flowers of
Conclusion, general
Conditions, slight changes in, favourable to fertility
Coot
Coral-islands, seeds drifted to; reefs, indicating movements of earth
Corn-crake
Correlation of growth in domestic productions; of growth
Cowslip
Creation, single centres of
Crinum
Crosses, reciprocal
Crossing of domestic animals, importance in altering breeds; advantages of; unfavourable to
selection
Crustacea of New Zealand
Crustacean, blind
Cryptocerus

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Ctenomys, blind
Cuckoo, instinct of
Currants, grafts of
Currents of sea, rate of
Cuvier on conditions of existence; on fossil monkeys; Fred., on instinct
Dana, Prof., on blind cave-animals; on relations of crustaceans of Japan, on crustaceans of New
Zealand
De Candolle on struggle for existence; on umbelliferae; on general affinities; Alph., on low plants,
widely dispersed; on widely-ranging plants being variable; on naturalisation; on winged seeds; on
Alpine species suddenly becoming rare; on distribution of plants with large seeds; on vegetation of
Australia; on fresh-water plants; on insular plants
Degradation of coast-rocks
Denudation, rate of; of oldest rocks
Development of ancient forms
Devonian system
Dianthus, fertility of crosses
Dirt on feet of birds
Division, physiological, of labour
Dogs, hairless, with imperfect teeth; descended from several wild stocks; domestic instincts of;
inherited civilisation of; fertility of breeds together; of crosses; proportions of, when young
Downing, Mr., on fruit-trees in America
Downs, North and South
Dragon-flies, intestines of
Drift-timber
Driver-ant
Drones killed by other bees

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Duck, domestic, wings of, reduced; logger-headed
Duckweed
Dugong, affinities of
Dung-beetles with deficient tarsi
Dyticus
Earl, Mr., W., on the Malay Archipelago
Ears, drooping, in domestic animals; rudimentary
Earth, seeds in roots of trees
Eciton
Edentata, teeth and hair; fossil species of
Edwards, Milne, on physiological divisions of labour; on gradations of structure; on embryological
characters
Eggs, young birds escaping from
Electric organs
Elephant, rate increase; of glacial period
Existence, struggle for; conditions of
Eye, structure of; correction for aberration
Eyes reduced in moles
Fabre, M., on parasitic sphex
Falconer, Dr., on naturalisation of plants in India; on fossil crocodile; on elephants and mastodons;
and Cautley on mammals of sub-Himalayan beds
Falkland Island, wolf of
Faults
Fear, instinctive, in birds
Feet of birds, young molluscs adhering to

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Fertility of hybrids, from slight changes in conditions; of crossed varieties
Fir-trees destroyed by cattle; pollen of
Fish, flying; teleostean, sudden appearance of; eating seeds; fresh-water, distribution of
Fishes, ganoid, now confined to fresh water; electric organs of; of southern hemisphere
Flight, powers of, how acquired
Flowers, structure of; in relation to crossing; of composite and umbelliferae
Forbes, E., on colours of shells; on abrupt range of shells in depth; on poorness of palaeontological
collections; on continuous succession of genera; on continental extensions; on distribution during
glacial period; on parallelism in time and space
Forests, changes in, in America
Formation, Devonian
Formations, thickness of, in Britain; intermittent
Formica rufescens; sanguinea; flava, neuter of
Frena, ovigerous, of cirripedes
Fresh-water productions, dispersal of
Fries on species in large genera being closely allied to other species
Frigate-bird
Frogs on islands
Fruit-trees, gradual improvement of; in United States; varieties of, acclimatised in United States
Fuci, crossed
Fur, thicker in cold climates
Furze
Galapagos Archipelago, birds of; productions of
Galeopithecus

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Game, increase of, checked by vermin
Gartner on sterility of hybrids; on reciprocal crosses; on crossed maize and verbascum; on
comparison of hybrids and mongrels
Geese, fertility when crossed; upland
Genealogy important in classification
Geoffroy St. Hilaire on balancement; on homologous organs; Isidore, on variability of repeated
parts; on correlation in monstrosities; on correlation; on variable parts being often monstrous
Geographical distribution
Geology, future progress of
Giraffe, tail of
Glacial period
Gmelin on Distribution
Gnathodon, fossil
Godwin-Austin, Mr., on the Malay Archipelago
Goethe on compensation of growth
Gooseberry, grafts of
Gould, Dr. A., on land-shells; Mr., on colours of birds; on birds of the Galapagos; on distribution of
genera of birds
Gourds, crossed
Grafts, capacity of
Grasses, varieties of
Gray, Dr. Asa, on trees of United States; on naturalised plants in the United States; on rarity of
intermediate varieties; on Alpine plants; Dr. J.E., on striped mule
Grebe
Grouse, colours of; red, a doubtful species
Growth, compensation of; correlation of, in domestic products; correlation of

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Habit, effect of, under domestication; effect of, under nature; diversified, of same species
Hair and teeth, correlated
Harcourt, Mr. E.V., on the birds of Madeira
Hartung, M., on boulders in the Azores
Hazel-nuts
Hearne on habits of bears
Heath, changes in vegetation
Heer, O., on plants of Madeira
Helix pomatia
Helosciadium
Hemionus, striped
Herbert, W., on struggle for existence; on sterility of hybrids
Hermaphrodites crossing
Heron eating seed
Heron, Sir R., on peacocks
Heusinger, on white animals not poisoned by certain plants
Hewitt, Mr., on sterility of first crosses
Himalaya, glaciers of; plants of
Hippeastrum
Holly-trees, sexes of
Hollyhock, varieties of, crossed
Hooker, Dr., on trees of New Zealand
Hooker, Dr., on acclimatisation of Himalayan trees; on flowers of umbelliferae; on glaciers of
Himalaya; on algae of New Zealand; on vegetation at the base of the Himalaya; on plants of Tierra

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del Fuego; on Australian plants; on relations of flora of South America; on flora of the Antarctic
lands; on the plants of the Galapagos
Hooks on bamboos; to seeds on islands
Horner, Mr., on the antiquity of Egyptians
Horns, rudimentary
Horse, fossil, in La Plata
Horses destroyed by flies in La Plata; striped; proportions of, when young
Horticulturists, selection applied by
Huber on cells of bees; P., on reason blended with instinct; on habitual nature of instincts; on slave-
making ants; on Melipona domestica
Humble-bees; cells of
Hunter, J., on secondary sexual characters
Hutton, Captain, on crossed geese
Huxley, Prof., on structure of hermaphrodites; on embryological succession; on homologous
organs; on the development of aphis
Hybrids and mongrels compared
Hybridism
Hydra, structure of
Ibla
Icebergs transporting seeds
Individuals, numbers favourable to selection; many, whether simultaneously created
Insects, colour of, fitted for habitation; sea-side colours of; blind, in caves; luminous; neuter
Instincts, domestic
Intercrossing, advantages of
Japan, productions of

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Java, plants of
Jones, Mr. J.M., on the birds of Bermuda
Jussieu on classification
Kentucky, caves of
Kerguelen-land, flora of
Kidney-bean, acclimatisation of
Kidneys of birds
Kirby on tarsi deficient in beetles
Knight, Andrew, on cause of variation
Kolreuter on the barberry; on sterility of hybrids; on reciprocal crosses; on crossed varieties of
nicotiana; on crossing male and hermaphrodite flowers
Land-shells, distribution of, of Madeira, naturalised
Languages, classification of
Lapse, great, of time
Larvae
Laurel, nectar secreted by the leaves
Laws of variation
Leech, varieties of
Leguminosae, nectar secreted by glands
Lepidosiren
Life, struggle for
Lingula, Silurian
Linnaeus, aphorism of
Lion, mane of; young of, striped

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Lobelia fulgens
Lobelia, sterility of crosses
Loess of the Rhine
Lowness of structure connected with variability
Lowness, related to wide distribution
Lubbock, Mr., on the nerves of coccus
Lucas, Dr. P., on inheritance; on resemblance of child to parent
Lund and Clausen on fossils of Brazil
Lyell, Sir C., on the struggle for existence; on modern changes of the earth; on measure of
denudation; on a carboniferous land-shell; on fossil whales; on strata beneath Silurian system; on
the imperfection of the geological record; on the appearance of species; on Barrande's colonies; on
tertiary formations of Europe and North America; on parallelism of tertiary formations; on
transport of seeds by icebergs; on great alternations of climate; on the distribution of fresh-water
shells; on land-shells of Madeira
Lyell and Dawson on fossilized trees in Nova Scotia
Macleay on analogical characters
Madeira, plants of; beetles of, wingless; fossil land-shells of; birds of
Magpie tame in Norway
Maize, crossed
Malay Archipelago compared with Europe; mammals of
Malpighiaceae
Mammae, rudimentary
Mammals, fossil, in secondary formation; insular
Man, origin of races of
Manatee, rudimentary nails of
Marsupials of Australia, fossil species of

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Martens, M., experiment on seeds
Martin, Mr. W.C., on striped mules
Matteuchi on the electric organs of rays
Matthiola, reciprocal crosses of
Means of dispersal
Melipona domestica
Metamorphism of oldest rocks
Mice destroying bees; acclimatisation of
Migration, bears on first appearance of fossils
Miller, Prof., on the cells of bees
Mirabilis, crosses of
Missel-thrush
Misseltoe, complex relations of
Mississippi, rate of deposition at mouth
Mocking-thrush of the Galapagos
Modification of species, how far applicable
Moles, blind
Mongrels, fertility and sterility of; and hybrids compared
Monkeys, fossil
Monocanthus
Mons, Van, on the origin of fruit-trees
Mozart, musical powers of
Mud, seeds in
Mules, striped

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Muller, Dr. F., on Alpine Australian plants
Murchison, Sir, R., on the formations of Russia; on azoic formations; on extinction
Mustela vison
Myanthus
Myrmecocystus
Myrmica, eyes of
Nails, rudimentary
Natural history, future progress of
Naturalisation of forms distinct from the indigenous species; in New Zealand
Nautilus, Silurian
Nectar of plants
Nectaries, how formed
Nelumbium luteum
Nests, variation in
Neuter insects
New Zealand, productions of, not perfect; naturalised products of; fossil birds of; glacial action in;
crustaceans of; algae of; number of plants of; flora of
Nicotiana, crossed varieties of; certain species very sterile
Noble, Mr., on fertility of Rhododendron
Nodules, phosphatic, in azoic rocks
Oak, varieties of
Onites apelles
Orchis, pollen of
Ornithorhynchus

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Ostrich not capable of flight; habit of laying eggs together; American, two species of
Otter, habits of, how acquired
Ouzel, water
Owen, Prof., on birds not flying; on vegetative repetition; on variable length of arms in ourang-
outang; on the swim-bladder of fishes; on electric organs; on fossil horse of La Plata; on relations
of ruminants and pachyderms; on fossil birds of New Zealand; on succession of types; on affinities
of the dugong; on homologous organs; on the metamorphosis of cephalopods and spiders
Pacific Ocean, faunas of
Paley, on no organ formed to give pain
Pallas, on the fertility of the wild stocks of domestic animals
Paraguay, cattle destroyed by flies
Parasites