The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
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Стр. 30
... families , as we will already term them ; but if we dis- regard the dubious , and in many ways suspicious , exis- tences , generally comprised under the name of primordial animals , there is a general agreement as to the following ...
... families , as we will already term them ; but if we dis- regard the dubious , and in many ways suspicious , exis- tences , generally comprised under the name of primordial animals , there is a general agreement as to the following ...
Стр. 31
Dr. Schmidt (Eduard Oskar), Oscar Schmidt. TYPES AND FAMILIES . 31 arranged radially round an axis , passing through the dorsal and ventral pole . The cavity , which in most other animals - for instance , in man - is termed the abdominal ...
Dr. Schmidt (Eduard Oskar), Oscar Schmidt. TYPES AND FAMILIES . 31 arranged radially round an axis , passing through the dorsal and ventral pole . The cavity , which in most other animals - for instance , in man - is termed the abdominal ...
Стр. 34
... families by further examples ; the most superficial com- parison of a 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 ...
... families by further examples ; the most superficial com- parison of a 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 ...
Стр. 35
... families can- not be represented in a simple line ; though in former days more importance was attributed to the general indications of the relative value of the types . On the other hand , descriptive zoology had long been compelled to ...
... families can- not be represented in a simple line ; though in former days more importance was attributed to the general indications of the relative value of the types . On the other hand , descriptive zoology had long been compelled to ...
Стр. 69
... families , we find the quite peculiar group of Graptolites ( fig . 9 ) , which , although not actual polypes , might he ranged next to the so - called Medusa- polypes , and thus justify the inference . that preparation was being made ...
... families , we find the quite peculiar group of Graptolites ( fig . 9 ) , which , although not actual polypes , might he ranged next to the so - called Medusa- polypes , and thus justify the inference . that preparation was being made ...
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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.