The Doctrine of Descent and DarwinismD. Appleton, 1875 - 334 من الصفحات |
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الصفحة 70
... 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 .
... 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 .
الصفحة 71
... fauna , the rapid decrease of the Trilobites is worthy of notice , and the appearance of the important genus of the Cephalopoda , Clymenia , subsequently replaced by the Ammonites . Above all , we must note the increased abundance of ...
... fauna , the rapid decrease of the Trilobites is worthy of notice , and the appearance of the important genus of the Cephalopoda , Clymenia , subsequently replaced by the Ammonites . Above all , we must note the increased abundance of ...
الصفحة 72
... - scorpions , myriapods , and in- sects - in other words , air - breathing Articulata , and likewise the first air - breathing Vertebrata . The latter , FAUNA OF THE TRIAS . 73 the Cheirotheria , or 72 THE DOCTRINE OF DESCENT .
... - scorpions , myriapods , and in- sects - in other words , air - breathing Articulata , and likewise the first air - breathing Vertebrata . The latter , FAUNA OF THE TRIAS . 73 the Cheirotheria , or 72 THE DOCTRINE OF DESCENT .
الصفحة 73
Dr. Schmidt (Eduard Oskar), Oscar Schmidt. FAUNA OF THE TRIAS . 73 the Cheirotheria , or Labyrinthodonta ( colossal Batra- chians ) possess pre - eminently amphibian characters , and exhibit , for example , several important ...
Dr. Schmidt (Eduard Oskar), Oscar Schmidt. FAUNA OF THE TRIAS . 73 the Cheirotheria , or Labyrinthodonta ( colossal Batra- chians ) possess pre - eminently amphibian characters , and exhibit , for example , several important ...
الصفحة 74
... fauna the Ammonites , which now appear in vast masses , and the Nautili , the second chief form of the ancient Cephalopods , the study of which has recently promised to contribute essentially to the decision of the most important points ...
... fauna the Ammonites , which now appear in vast masses , and the Nautili , the second chief form of the ancient Cephalopods , the study of which has recently promised to contribute essentially to the decision of the most important points ...
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عبارات ومصطلحات مألوفة
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
مقاطع مشهورة
الصفحة 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...
الصفحة 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.
الصفحة 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.