The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
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Стр. 270
... placenta . The blood - vessels of the developing offspring which reach the wall of the uterus by the intervention of the allantois , form coils PEDIGREE OF MAMMALS . 271 and loops , between which 270 THE DOCTRINE OF DESCENT.
... placenta . The blood - vessels of the developing offspring which reach the wall of the uterus by the intervention of the allantois , form coils PEDIGREE OF MAMMALS . 271 and loops , between which 270 THE DOCTRINE OF DESCENT.
Стр. 272
... placenta is likewise employed in the grouping of organisms . If among the Deciduata , lemurs , rodents , insectivora , bats and monkeys , are classed together as orders with discoidal placenta , this combination is cer- tainly supported ...
... placenta is likewise employed in the grouping of organisms . If among the Deciduata , lemurs , rodents , insectivora , bats and monkeys , are classed together as orders with discoidal placenta , this combination is cer- tainly supported ...
Стр. 273
... placenta might similarly arise in different ways , just as it has been variously developed in the well - sub- stantiated division of the Ungulata . To corroborate our view by example , we are certainly unable to make any positive ...
... placenta might similarly arise in different ways , just as it has been variously developed in the well - sub- stantiated division of the Ungulata . To corroborate our view by example , we are certainly unable to make any positive ...
Стр. 279
... placenta , which constitute the phenomena of the decidua , assume very heterogenous forms in groups belonging to the same family , and may be alike in others no more nearly related , the Cetacea would be installed in our pedigree in the ...
... placenta , which constitute the phenomena of the decidua , assume very heterogenous forms in groups belonging to the same family , and may be alike in others no more nearly related , the Cetacea would be installed in our pedigree in the ...
Стр. 288
... placenta , and we must therefore justify ourselves now , when we lay a stress on the accordance of the placenta of man and apes . The orders mentioned above all possess a placenta of small extent and discoidal form . In the shape of ...
... placenta , and we must therefore justify ourselves now , when we lay a stress on the accordance of the placenta of man and apes . The orders mentioned above all possess a placenta of small extent and discoidal form . In the shape of ...
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Часто встречающиеся слова и выражения
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.