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 64
... areas of such rocks in many parts of the world , except on the belief that they have subsequently been completely denuded of all overlying strata ? That such extensive areas do exist cannot be doubted : the granitic region of Parime is ...
... areas of such rocks in many parts of the world , except on the belief that they have subsequently been completely denuded of all overlying strata ? That such extensive areas do exist cannot be doubted : the granitic region of Parime is ...
Página 87
... areas of subsidence , the great archipelagoes still areas of oscilla- tions of level , and the continents areas of elevation . But we have no reason to assume that things have thus remained from the beginning of the world . Our contin ...
... areas of subsidence , the great archipelagoes still areas of oscilla- tions of level , and the continents areas of elevation . But we have no reason to assume that things have thus remained from the beginning of the world . Our contin ...
Página 158
... areas completely sundered . Thus , I think , we can under- stand the presence of some closely allied , still existing and extinct tertiary forms , on the eastern and western shores of temperate North America ; and the still more ...
... areas completely sundered . Thus , I think , we can under- stand the presence of some closely allied , still existing and extinct tertiary forms , on the eastern and western shores of temperate North America ; and the still more ...
Contenido
CONTENTS OF VOL | 1 |
CHAPTER X | 48 |
CHAPTER XII | 129 |
Derechos de autor | |
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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