The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life, Volumen2AMS Press, 1972 |
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Página 79
... known fact that in geological treatises , published not many years ago , mammals were always spoken of as having abruptly come in at the commencement of the tertiary series . And now one of the richest known ac- cumulations of fossil ...
... known fact that in geological treatises , published not many years ago , mammals were always spoken of as having abruptly come in at the commencement of the tertiary series . And now one of the richest known ac- cumulations of fossil ...
Página 82
... known Fossiliferous Strata . There is another and allied difficulty , which is much more serious . I allude to the manner in which species belonging to several of the main divisions of the animal kingdom suddenly appear in the lowest known ...
... known Fossiliferous Strata . There is another and allied difficulty , which is much more serious . I allude to the manner in which species belonging to several of the main divisions of the animal kingdom suddenly appear in the lowest known ...
Página 84
... known with accuracy . Not very long ago M. Barrande added another and lower stage , abounding with new and peculiar species , beneath the then known Silurian system ; and now , still lower down in the Lower Cambrian formation , Mr ...
... known with accuracy . Not very long ago M. Barrande added another and lower stage , abounding with new and peculiar species , beneath the then known Silurian system ; and now , still lower down in the Lower Cambrian formation , Mr ...
Contenido
CONTENTS OF VOL | 1 |
CHAPTER X | 48 |
CHAPTER XII | 129 |
Derechos de autor | |
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The Origin of Species by Means of Natural Selection: Or, The Preservation of ... Charles Darwin Vista de fragmentos - 1962 |
The Origin of Species by Means of Natural Selection: Or, The Preservation of ... Charles Darwin Vista de fragmentos - 1963 |
Términos y frases comunes
accumulated adapted admit adult affinity allied species ancient animals appear Archipelago arctic areas become beds believe birds breeds Cambrian changes characters classification climate closely allied continent crustaceans degree deposited difficulty distant distinct species domestic doubt embryo 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 individuals 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 parent parent-form peculiar perfect pistil plants pollen present probably produced quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs seeds Silurian slight South America species belonging stage stamens sterility structure successive suppose terrestrial tertiary tion variations varieties whilst widely different wings