The Origin of Species, Том 2Books, Incorporated, 1900 - Всего страниц: 365 |
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Стр. 284
... naturalists to be identical with existing species ; but some excellent naturalists , as Agassiz and Pictet , maintain that all these tertiary species are specifically distinct , though the distinction is admitted to be very slight ; so ...
... naturalists to be identical with existing species ; but some excellent naturalists , as Agassiz and Pictet , maintain that all these tertiary species are specifically distinct , though the distinction is admitted to be very slight ; so ...
Стр. 394
... naturalists as homologous . He proposes to call the structures which resemble each other in distinct animals , owing to their descent from a common progenitor with subsequent modifi- cation , homogenous ; and the resemblances which ...
... naturalists as homologous . He proposes to call the structures which resemble each other in distinct animals , owing to their descent from a common progenitor with subsequent modifi- cation , homogenous ; and the resemblances which ...
Стр. 432
... naturalists , endowed with much flexibil- ity of mind , and who have already begun to doubt the immu- tability of species , may be influenced by this volume ; but I look with confidence to the future , to young and rising naturalists ...
... naturalists , endowed with much flexibil- ity of mind , and who have already begun to doubt the immu- tability of species , may be influenced by this volume ; but I look with confidence to the future , to young and rising naturalists ...
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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