The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
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Стр. 269
... Elephants Ungulates ( Primordial Ungulates ) Edentata PEDIGREE . Man Monkeys Insectivora Bats Lemurs ( Placental Mammals ) Marsupials Monotremata . Beasts of Prey Seals Whales ( Primordial Beasts of Prey ) PEDIGREE OF MAMMALS . 269.
... Elephants Ungulates ( Primordial Ungulates ) Edentata PEDIGREE . Man Monkeys Insectivora Bats Lemurs ( Placental Mammals ) Marsupials Monotremata . Beasts of Prey Seals Whales ( Primordial Beasts of Prey ) PEDIGREE OF MAMMALS . 269.
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 and loops , between which grow similar offshoots and appendages 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 and loops , between which grow similar offshoots and appendages 270 THE DOCTRINE OF DESCENT.
Стр. 271
... placental mammals , usually plainly evinced by their anatomical relations , is thus based on the existence of the placental mass . All inter- mediate grades are , however , wanting which would entitle us to infer with certainty the ...
... placental mammals , usually plainly evinced by their anatomical relations , is thus based on the existence of the placental mass . All inter- mediate grades are , however , wanting which would entitle us to infer with certainty the ...
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. 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 ...
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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.