Contributions to the Theory of Natural Selection: A Series of EssaysMacmillan and Company, 1875 - 384 pages |
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Page 42
... tints may have occurred , yet those races having colours best adapted to concealment from their enemies would inevitably survive the longest . We have also here an acting cause to account for that balance so often observed in nature ...
... tints may have occurred , yet those races having colours best adapted to concealment from their enemies would inevitably survive the longest . We have also here an acting cause to account for that balance so often observed in nature ...
Page 48
... tints well suited for conceal- ment among grass and fern . But when these rabbits are domesticated , without any ... tint of the bark or leaf it is accustomed to rest on , but the form and veining of the leaf or the exact rugosity of the ...
... tints well suited for conceal- ment among grass and fern . But when these rabbits are domesticated , without any ... tint of the bark or leaf it is accustomed to rest on , but the form and veining of the leaf or the exact rugosity of the ...
Page 49
... tints as may best serve to enable it to es- cape from its enemies or to entrap its prey . Desert animals as a rule are desert - coloured . The lion is a typical example of this , and must be almost in- visible when crouched upon the ...
... tints as may best serve to enable it to es- cape from its enemies or to entrap its prey . Desert animals as a rule are desert - coloured . The lion is a typical example of this , and must be almost in- visible when crouched upon the ...
Page 51
... , and must be quite invisible at times when any light colour would be instantly seen . Owls and goatsuckers are of those dark mottled tints that will assimilate with bark and lichen , and thus E 2 RESEMBLANCES AMONG ANIMALS . 51.
... , and must be quite invisible at times when any light colour would be instantly seen . Owls and goatsuckers are of those dark mottled tints that will assimilate with bark and lichen , and thus E 2 RESEMBLANCES AMONG ANIMALS . 51.
Page 52
... tint which has been so far shown to exist between animals and their habitations is of a somewhat general character ; we will now consider the cases of more special adaptation . If the lion is enabled by his sandy colour readily to ...
... tint which has been so far shown to exist between animals and their habitations is of a somewhat general character ; we will now consider the cases of more special adaptation . If the lion is enabled by his sandy colour readily to ...
Other editions - View all
Contributions to the Theory of Natural Selection: A Series of Essays ... Alfred Russel Wallace No preview available - 2018 |
Contributions to the Theory of Natural Selection: A Series of Essays Alfred Russel Wallace No preview available - 2016 |
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abundant adapted affinity animals antennæ antitypes appear beauty become beetles believe birds Borneo brain build butterflies caterpillars causes Celebes changes character closely allied species colour concealed conspicuous Crown 8vo curious Danaidæ Darwin Diphilus distinct earth Edition eggs epoch essay exactly example existence explained extinct facts faculties favourable flowers genera genus geological geological periods groups habits Heliconidæ Illustrations imitation India individuals inhabiting insects instinct islands Java larvæ Lepidoptera less Malayan male mimic mimicry mode modifications Moluccas moths natural selection nectary nest never nidification number of species observations occur Origin of Species Ormenus Pammon Papilio Papilio Ulysses Papilionidæ peculiar period phenomena physical Polydorus possess present probably produced Professor protection race regions remarkable render resemble savage Science sexes sexual selection shown structure Sumatra tail theory of natural Theseus tints tion TREATISE trees tropical University variation varied varieties whole wings
Popular passages
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Page 326 - natural selection' himself, but he is actually able to take away some of that power from nature which, before his appearance, she universally exercised. We can anticipate the time when the earth will produce only cultivated plants and domestic animals ; when man's selection shall have supplanted
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