The Origin of Species, Том 2Books, Incorporated, 1900 - Всего страниц: 365 |
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Стр. 272
... rock . At last the base of the cliff is un- dermined , huge fragments fall down , and these , remaining fixed ... rocks of which they are com- posed , having resisted subaërial denudation better than the sur- 272 THE ORIGIN OF SPECIES.
... rock . At last the base of the cliff is un- dermined , huge fragments fall down , and these , remaining fixed ... rocks of which they are com- posed , having resisted subaërial denudation better than the sur- 272 THE ORIGIN OF SPECIES.
Стр. 279
... rocks once formed the primordial nucleus of the globe , will admit that these latter rocks have been stripped of their covering to an enormous extent . For it is scarcely possible that such rocks could have been solidi- fied and ...
... rocks once formed the primordial nucleus of the globe , will admit that these latter rocks have been stripped of their covering to an enormous extent . For it is scarcely possible that such rocks could have been solidi- fied and ...
Стр. 280
... rocks exceed , in the proportion of 19 to 12.5 , the whole of the newer Palæozoic formations . In many regions the metamorphic and granite rocks would be found much more widely extended than they appear to be , if all the sedi- mentary ...
... rocks exceed , in the proportion of 19 to 12.5 , the whole of the newer Palæozoic formations . In many regions the metamorphic and granite rocks would be found much more widely extended than they appear to be , if all the sedi- mentary ...
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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