The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
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Стр. 70
... the appearance of this , the most ancient molluscous fauna known , differs from the present one only in its numerical proportions , and in the FAUNA OF THE DEVONIAN PERIOD . 71 circumstance , certainly 70 THE DOCTRINE OF DESCENT .
... the appearance of this , the most ancient molluscous fauna known , differs from the present one only in its numerical proportions , and in the FAUNA OF THE DEVONIAN PERIOD . 71 circumstance , certainly 70 THE DOCTRINE OF DESCENT .
Стр. 75
... known resting - places of the Pterodactyls , in the lithographic slates of Solnhofen in Bavaria ( Archæ- opterix lithographica ) . The most remarkable peculiarity of this bird , recognizable by the most minute impression of its feathers ...
... known resting - places of the Pterodactyls , in the lithographic slates of Solnhofen in Bavaria ( Archæ- opterix lithographica ) . The most remarkable peculiarity of this bird , recognizable by the most minute impression of its feathers ...
Стр. 76
... known to all our readers in their representatives the star - fish and sea - urchins . If articulate , as well as vertebrate , animals attain a higher grade of development by the differentiation of the con- secutive segments of the body ...
... known to all our readers in their representatives the star - fish and sea - urchins . If articulate , as well as vertebrate , animals attain a higher grade of development by the differentiation of the con- secutive segments of the body ...
Стр. 77
... known , found in the upper Silurian strata of Dudley ( Eucladia Johnsoni ) , the more impor- tant as but few transitional forms between one order and another have been hitherto discovered . The rela- tion of the star - fish to the sea ...
... known , found in the upper Silurian strata of Dudley ( Eucladia Johnsoni ) , the more impor- tant as but few transitional forms between one order and another have been hitherto discovered . The rela- tion of the star - fish to the sea ...
Стр. 91
... known by its forms , there are among the systematizers no two autho- rities who are agreed as to the number of species into which the material before them should be divided . The most unbridled license in the manufacture of species ...
... known by its forms , there are among the systematizers no two autho- rities who are agreed as to the number of species into which the material before them should be divided . The most unbridled license in the manufacture of species ...
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according adaptation already Ammonites Amphibians animal world apes appearance Ascidian become birds brain causes Cetacea character characteristics comparative anatomy complete connection continent Darwin dentition derivation diverge doctrine of Descent Echinoderms embryonic Eocene exhibit 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 intermediate forms islands lancelet language larva larvæ likewise linguistic Linnæus 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 sponges strata structure systematic terrestrial animals Tertiary theory of selection tion transformation transition true Ungulata Ungulates varieties vegetal 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 - I had not formerly sufficiently considered the existence of many structures which appear to be, as far as we can judge, neither beneficial nor injurious ; and this I believe to be one of the greatest oversights as yet detected in my work.
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.