The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
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Стр. 7
... doctrine of the gradual and direct development of the higher and now - existing organisms from lower ancestral forms - in short , for the doctrine of the continuity of life , we must begin with a survey of the REFERENCE TO DARWIN . 7.
... doctrine of the gradual and direct development of the higher and now - existing organisms from lower ancestral forms - in short , for the doctrine of the continuity of life , we must begin with a survey of the REFERENCE TO DARWIN . 7.
Стр. 30
... of the Spongiada , especially in- structive as affording direct evidence of the doctrine of Descent . The organs of these animals are nearly always arranged radially round an axis , passing through the dorsal 30 THE DOCTRINE OF DESCENT .
... of the Spongiada , especially in- structive as affording direct evidence of the doctrine of Descent . The organs of these animals are nearly always arranged radially round an axis , passing through the dorsal 30 THE DOCTRINE OF DESCENT .
Стр. 33
... direct reverse is shown in the integuments of the Mollusca , our mussels , snails , and cuttle - fish . For although so many are supplied with protecting scales and shells , these are mere excretions from the actual skin , which remains ...
... direct reverse is shown in the integuments of the Mollusca , our mussels , snails , and cuttle - fish . For although so many are supplied with protecting scales and shells , these are mere excretions from the actual skin , which remains ...
Стр. 35
... direct line , nor does the elongated branch line of the latter merge , as might be imagined , into the reptiles . The birds , on their side , offer a sharp contrast to the mammals , and this separa- tion and divergence extend to all the ...
... direct line , nor does the elongated branch line of the latter merge , as might be imagined , into the reptiles . The birds , on their side , offer a sharp contrast to the mammals , and this separa- tion and divergence extend to all the ...
Стр. 37
... direct relationship , but in a remote cousinhood . The But we must draw attention , not to these connecting forms , which natural history assumes as perfectly self- evident , but to those which are , as it were , inconvenient to ...
... direct relationship , but in a remote cousinhood . The But we must draw attention , not to these connecting forms , which natural history assumes as perfectly self- evident , but to those which are , as it were , inconvenient to ...
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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.