The Origin of Species, Том 2Books, Incorporated, 1900 - Всего страниц: 365 |
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Стр. 270
... modified descendants . To give a simple illustration : the fantail and pouter pigeons are both descended from the rock - pigeon ; if we possessed all the inter- mediate varieties which have ever existed , we should have an ex- tremely ...
... modified descendants . To give a simple illustration : the fantail and pouter pigeons are both descended from the rock - pigeon ; if we possessed all the inter- mediate varieties which have ever existed , we should have an ex- tremely ...
Стр. 311
... descent have diverged in a less degree from their common pro- genitor . Thus it comes that ancient and extinct genera are often in a greater or less degree intermediate in character between their modified descendants , or between their ...
... descent have diverged in a less degree from their common pro- genitor . Thus it comes that ancient and extinct genera are often in a greater or less degree intermediate in character between their modified descendants , or between their ...
Стр. 318
... modified descendants . If the inhabitants of one continent formerly differed greatly from those of another continent , so will their modified descendants still differ in nearly the same manner and degree . But after very long inter ...
... modified descendants . If the inhabitants of one continent formerly differed greatly from those of another continent , so will their modified descendants still differ in nearly the same manner and degree . But after very long inter ...
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adapted admit affinity ancient animals appear Archipelago areas become believe belonging birds Cambrian characters classification climate closely allied species common continent creation crustaceans degree deposits descent with modification developed difficulty distant distinct species domestic doubt embryo Europe existing extinct facts faunas fertility flowers formations formerly forms fossil fresh-water Fritz Müller Gärtner genera genus geological period geological record Glacial period groups of species habits hybrids hybrids produced important INDIANENSIS individuals inhabitants inherited insects instance intermediate intervals land larvæ less living mammæ mammals manner marine Marsupials MDCCCXX migration modified descendants mongrels mountains natural selection naturalists nearly oceanic islands offspring parent peculiar perfect pistil plants pollen present probably produced progenitor quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs seeds SIGILLUM Silurian South America stage stamens sterility structure successive suppose terrestrial tertiary theory of natural tion variations varieties VERITAS whole widely different