The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
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Стр. 45
... mammals inclusive of man , they are essentially similar . Nor do non - essential differences appear until the primitive germ - cell is more abundantly provided with yelk and albumen , and has surrounded itself with a specially thick and ...
... mammals inclusive of man , they are essentially similar . Nor do non - essential differences appear until the primitive germ - cell is more abundantly provided with yelk and albumen , and has surrounded itself with a specially thick and ...
Стр. 55
... mammals and of birds , and the appropriate vessels were soon afterwards actually revealed . " The exaggerations and ... mammal and of man . Might not their physio- logical manuals teach as follows ? These quadrupeds and bipeds have much ...
... mammals and of birds , and the appropriate vessels were soon afterwards actually revealed . " The exaggerations and ... mammal and of man . Might not their physio- logical manuals teach as follows ? These quadrupeds and bipeds have much ...
Стр. 56
... mammals which , so long after birth , are unable to find their own food , and never rise from the ground , fancy themselves more highly organised than we ? ' " FIG . 8 . FIG . 7 . Nevertheless , there remains the fact of the parallelism ...
... mammals which , so long after birth , are unable to find their own food , and never rise from the ground , fancy themselves more highly organised than we ? ' " FIG . 8 . FIG . 7 . Nevertheless , there remains the fact of the parallelism ...
Стр. 57
... mammals and to man , they have , nevertheless , carried it a stage further than the reptiles , for the scale is the embryonic rudiment of the feather . Likewise , the tarso - meta- tarsal joint of the embryonic bird , with which we are ...
... mammals and to man , they have , nevertheless , carried it a stage further than the reptiles , for the scale is the embryonic rudiment of the feather . Likewise , the tarso - meta- tarsal joint of the embryonic bird , with which we are ...
Стр. 58
... mammals are never actual fish , there is much that is fish - like in the em- bryonic phases of their organs ; the ... mammal should be more like that of the fish , than the embryo of the fish is like the mammal . Now , if the fish be ...
... mammals are never actual fish , there is much that is fish - like in the em- bryonic phases of their organs ; the ... mammal should be more like that of the fish , than the embryo of the fish is like the mammal . Now , if the fish be ...
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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.