The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
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Стр. 44
... represents a second intermediate generation . Its pro- ductiveness is forthwith displayed ; it becomes elon- gated , and as its ribbon - like form increases , shooting out from the posterior portion of the cervix , the more distinctly ...
... represents a second intermediate generation . Its pro- ductiveness is forthwith displayed ; it becomes elon- gated , and as its ribbon - like form increases , shooting out from the posterior portion of the cervix , the more distinctly ...
Стр. 53
... represents the embryo of the great black - beetle ( Hydro- philus piceus ) on its ventral side . The antennæ ( ƒ ) , the three pair of oral appendages ( m ) , and the three pair of legs , are as yet little distinguished . In the further ...
... represents the embryo of the great black - beetle ( Hydro- philus piceus ) on its ventral side . The antennæ ( ƒ ) , the three pair of oral appendages ( m ) , and the three pair of legs , are as yet little distinguished . In the further ...
Стр. 63
... represents this forma- tion in the centre of Germany , it is from the white chalk of England and Northern France that it took its name . In America , the sandstone has been in a great measure ground down into sand , and in other places ...
... represents this forma- tion in the centre of Germany , it is from the white chalk of England and Northern France that it took its name . In America , the sandstone has been in a great measure ground down into sand , and in other places ...
Стр. 69
... represented by the Trilobites ( fig . 10 , Trilobites remipes ) , a crab - like form which recalls the pre- sent group of the Lamellibranchiata , but has not hitherto admitted of any closer definition , as in none of the many thousand ...
... represented by the Trilobites ( fig . 10 , Trilobites remipes ) , a crab - like form which recalls the pre- sent group of the Lamellibranchiata , but has not hitherto admitted of any closer definition , as in none of the many thousand ...
Стр. 70
... represented by Brachiopoda and Cephalopoda . However , as Bivalves and Gaster- FIG . 10 . opoda were also in existence , the appearance of this , the most ancient molluscous fauna known , differs from the present one only in its ...
... represented by Brachiopoda and Cephalopoda . However , as Bivalves and Gaster- FIG . 10 . opoda were also in existence , the appearance of this , the most ancient molluscous fauna known , differs from the present one only in its ...
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Часто встречающиеся слова и выражения
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.