The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life, Volumen2D. Appleton, 1898 |
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Página 51
... fossil remains of such infinitely numerous connecting links , it may be objected that time cannot have sufficed for so great an amount of organic change , all changes having been effected slowly . It is hardly possible for me to recall ...
... fossil remains of such infinitely numerous connecting links , it may be objected that time cannot have sufficed for so great an amount of organic change , all changes having been effected slowly . It is hardly possible for me to recall ...
Página 58
... fossil species are known and named from single and often broken specimens , or from a few specimens collected on some one spot . Only a small portion of the surface of the earth has been geologically explored , and no part with ...
... fossil species are known and named from single and often broken specimens , or from a few specimens collected on some one spot . Only a small portion of the surface of the earth has been geologically explored , and no part with ...
Página 59
... fossil in Sicily , whereas not one other species has hitherto been found in any tertiary formation : yet it is known ... fossils , except a few vegetable remains , have been found . With respect to the terrestrial productions which lived ...
... fossil in Sicily , whereas not one other species has hitherto been found in any tertiary formation : yet it is known ... fossils , except a few vegetable remains , have been found . With respect to the terrestrial productions which lived ...
Página 62
... fossils , have thus been formed during subsidence . Since publishing my views on this subject in 1845 , I have watched the progress of Geology , and have been surprised to note how author after author , in treating of this or that great ...
... fossils , have thus been formed during subsidence . Since publishing my views on this subject in 1845 , I have watched the progress of Geology , and have been surprised to note how author after author , in treating of this or that great ...
Página 65
... during these very periods of subsidence , that the deposits which are , richest in fossils have been accumulated . On the Absence of Numerous Intermediate Varieties in any Single. CHAP . X. ] PALEONTOLOGICAL COLLECTIONS . 65.
... during these very periods of subsidence , that the deposits which are , richest in fossils have been accumulated . On the Absence of Numerous Intermediate Varieties in any Single. CHAP . X. ] PALEONTOLOGICAL COLLECTIONS . 65.
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admit affinity allied species ancient animals appear Archipelago arctic areas become believe belonging birds Cambrian changes characters cies classification climate closely allied continent crustaceans degree deposited difficulty distant distinct species domestic doubt embryo eral Europe existing extinct fact faunas fertilised fertility flowers formations formerly forms fossil fresh-water Fritz Müller Gärtner genera genus geological period geological record Glacial period groups of species habits hybrids hybrids produced important inhabitants inherited insects instance intermediate intervals land larvæ less living mammals manner marine Marsupials migration modified descendants mongrels mountains natural selection naturalists nearly occur oceanic islands offspring organisation palæontologists Palæozoic parent parent-form peculiar perfect pistil plants pollen present probably produced quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs seeds Silurian South America stage stamens sterility structure successive suppose terrestrial tertiary theory tion variations varieties whilst whole widely different wings