The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
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Стр. 96
... varieties of Planorbis multiformis are distributed in such a manner that individual layers are characterized as successive strata , by the exclusive occurrence or by the predominance of single or several varieties which , within the ...
... varieties of Planorbis multiformis are distributed in such a manner that individual layers are characterized as successive strata , by the exclusive occurrence or by the predominance of single or several varieties which , within the ...
Стр. 97
... varieties of the Steinheim snail , as mere morpho- logical series of variable constancy and duration , they who will not allow even this evidence to rouse them from their innate drowsiness , are like the ostrich which prefers not to see ...
... varieties of the Steinheim snail , as mere morpho- logical series of variable constancy and duration , they who will not allow even this evidence to rouse them from their innate drowsiness , are like the ostrich which prefers not to see ...
Стр. 99
... varieties . The untenableness of the physiological part of the definition of species has been conclusively shown first by Darwin and afterwards by Haeckel . It is known that even in a state of freedom good species not infrequently breed ...
... varieties . The untenableness of the physiological part of the definition of species has been conclusively shown first by Darwin and afterwards by Haeckel . It is known that even in a state of freedom good species not infrequently breed ...
Стр. 100
... varieties of the same species , as their crosses are productive . But after read- ing Darwin's careful comparison of the reports as to the relations of certain species of wolves with the dogs of savage nations , and of the European wolf ...
... varieties of the same species , as their crosses are productive . But after read- ing Darwin's careful comparison of the reports as to the relations of certain species of wolves with the dogs of savage nations , and of the European wolf ...
Стр. 118
... varieties , " and he contrasts them " with races possessed of a character , which they exhibit afresh in all their species , so that they may be ascertained in a rational method . " Goethe rests on this fact to illustrate his idea of ...
... varieties , " and he contrasts them " with races possessed of a character , which they exhibit afresh in all their species , so that they may be ascertained in a rational method . " Goethe rests on this fact to illustrate his idea of ...
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according adaptation already Ammonites Amphibians animal world apes appearance Ascidian become birds brain carboniferous causes Cetacea character characteristics comparative anatomy complete connection continent Darwin dentition derivation diverge doctrine of Descent Echinoderms embryonic Eocene exhibit existence external facts families fauna fish formation fossil Ganoids Gastrula genera genus geological Goethe grade gradually groups Haeckel heredity higher horse human hypothesis idea individual infer Insectivora intermediate forms islands lancelet language larva larvæ likewise linguistic lower mammals Marsupials Medusa ment merely metamorphosis modifications morphological mutability natural selection observation Oolite organisms origin peculiar pedigree perfect period phase phenomena placenta plants polypes possess present primordial progenitors races relations remains reproduction reptiles resemblance Rütimeyer says scarcely scientific separate sexual Silurian skull species strata structure systematic terrestrial animals Tertiary theory of selection tion transformation transition true Ungulata Ungulates varieties vertebral column Vertebrata vertebrate animals whole
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Стр. 162 - There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being evolved.18 Darwin always knew that his views would be controversial. A few days before The Origin of Species appeared, Darwin wrote, in a letter to Wallace, 'God knows what...
Стр. 160 - Na'geli on plants, and the remarks by various authors with respect to animals, more especially those recently made by Professor Broca, that in the earlier editions of my Origin of Species I perhaps attributed too much to the action of natural selection or the survival of the fittest.