The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
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Стр. 31
... fish ( Asterias ) and the sea - urchin ( Echinus ) , of which the general form is like- wise usually radiate . Besides a peculiar chalky deposit , or greater or less calcification of the skin covering , a system of water - canals forms ...
... fish ( Asterias ) and the sea - urchin ( Echinus ) , of which the general form is like- wise usually radiate . Besides a peculiar chalky deposit , or greater or less calcification of the skin covering , a system of water - canals forms ...
Стр. 33
... fish . For although so many are supplied with protecting scales . and shells , these are mere excretions from the actual skin , which remains soft , and characteristically moist and slimy , owing to the secretions of numerous glands ...
... fish . For although so many are supplied with protecting scales . and shells , these are mere excretions from the actual skin , which remains soft , and characteristically moist and slimy , owing to the secretions of numerous glands ...
Стр. 34
... fish with a bird or a mammal , of one of the parasitic crustacea with a crayfish or an insect , shows , as the older zoology represented it , that in the actual forms the ground plan , or " ideal types , " find very diversified ...
... fish with a bird or a mammal , of one of the parasitic crustacea with a crayfish or an insect , shows , as the older zoology represented it , that in the actual forms the ground plan , or " ideal types , " find very diversified ...
Стр. 35
... fishes we fall into great perplexity ; which to place at the end as being the highest . But take which we will , the ... fish - like animal , the lancelet ; and in these two we compare a low form of a high type , and a high form of a low ...
... fishes we fall into great perplexity ; which to place at the end as being the highest . But take which we will , the ... fish - like animal , the lancelet ; and in these two we compare a low form of a high type , and a high form of a low ...
Стр. 37
... fish - like animals , the Dipnoi , ( Lepidosirens and their congeners ) with the characters of Amphibians . The Infusoria possess many characteristics of the so - called primordial animals , but in other ways they differ from them , and ...
... fish - like animals , the Dipnoi , ( Lepidosirens and their congeners ) with the characters of Amphibians . The Infusoria possess many characteristics of the so - called primordial animals , but in other ways they differ from them , and ...
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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.