The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
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Стр. 4
... formation of words and language thought commences . It follows from the nature of these beginnings , that language is the natural expression of the spirit of a people ; that it does not stand still , but is for ever in process of ...
... formation of words and language thought commences . It follows from the nature of these beginnings , that language is the natural expression of the spirit of a people ; that it does not stand still , but is for ever in process of ...
Стр. 10
... formation of the malleus and incus , two other portions of the skull are evolved in the bird , having little or nothing to do with the auditory mechanism . In short , the history of deve- lopment , which describes the gradual formation ...
... formation of the malleus and incus , two other portions of the skull are evolved in the bird , having little or nothing to do with the auditory mechanism . In short , the history of deve- lopment , which describes the gradual formation ...
Стр. 11
... formations and metamorphoses ; we may - nay , we must , infer that , at a definite epoch of refrigeration , life appeared in a natural manner , that is to say , without any incomprehensible act of creation ; and during this slow ...
... formations and metamorphoses ; we may - nay , we must , infer that , at a definite epoch of refrigeration , life appeared in a natural manner , that is to say , without any incomprehensible act of creation ; and during this slow ...
Стр. 47
... formation of the larvæ of a di- pterous insect ( Cecidomyia , Miastor ) . In the ventral cavity of the maggots of these flies arises a second generation of maggots , of which the origin was primarily attributed to a simple germ - formation ...
... formation of the larvæ of a di- pterous insect ( Cecidomyia , Miastor ) . In the ventral cavity of the maggots of these flies arises a second generation of maggots , of which the origin was primarily attributed to a simple germ - formation ...
Стр. 48
... formation , the bifurca- tion or formation of the germinal membrane , after the completion of which , instead of the one primitive cell , a large number of cells are usually in existence , as the material for the distribution and ...
... formation , the bifurca- tion or formation of the germinal membrane , after the completion of which , instead of the one primitive cell , a large number of cells are usually in existence , as the material for the distribution and ...
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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.