The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life, 2권D. Appleton, 1898 |
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51 페이지
... 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 to the ...
... 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 to the ...
58 페이지
... remains which do become embedded , if in sand or gravel , will , when the beds are upraised , generally be dissolved by the percolation of rain - water charged with carbolic acid . Some of the many kinds of animals which live on the ...
... remains which do become embedded , if in sand or gravel , will , when the beds are upraised , generally be dissolved by the percolation of rain - water charged with carbolic acid . Some of the many kinds of animals which live on the ...
59 페이지
... remains , without our being able to assign any reason : one of the most striking instances is that of the Flysch formation , which consists of shale and sandstone , several thousand , occasionally even six thousand feet in thickness ...
... remains , without our being able to assign any reason : one of the most striking instances is that of the Flysch formation , which consists of shale and sandstone , several thousand , occasionally even six thousand feet in thickness ...
61 페이지
... remains can anywhere be found , though the supply of sediment must for ages have been great , from the enormous degradation of the coast - rocks and from muddy streams entering the sea . The explanation , no doubt , is , that the ...
... remains can anywhere be found , though the supply of sediment must for ages have been great , from the enormous degradation of the coast - rocks and from muddy streams entering the sea . The explanation , no doubt , is , that the ...
62 페이지
... formed over wide spaces during periods of subsidence , but only where the supply of sediment was sufficient to keep the sea shallow and to embed and preserve the remains before they had time to de-. 62 [ CHAP . X. THE POORNESS OF OUR.
... formed over wide spaces during periods of subsidence , but only where the supply of sediment was sufficient to keep the sea shallow and to embed and preserve the remains before they had time to de-. 62 [ CHAP . X. THE POORNESS OF OUR.
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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