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 113
... fauna of each geological period undoubtedly is intermediate in character , between the preceding and succeeding faunas . I need give only one instance , namely , the manner in which the fossils of the Devonian system , when this system ...
... fauna of each geological period undoubtedly is intermediate in character , between the preceding and succeeding faunas . I need give only one instance , namely , the manner in which the fossils of the Devonian system , when this system ...
Página 119
... faunas of successive periods . We shall appreciate this difficulty more clearly , by looking to certain existing faunas and floras . From the extraordinary manner in which European productions have recently spread over New Zealand , and ...
... faunas of successive periods . We shall appreciate this difficulty more clearly , by looking to certain existing faunas and floras . From the extraordinary manner in which European productions have recently spread over New Zealand , and ...
Página 132
... faunas . Although so few marine animals are common to the above - named three approximate faunas of Eastern and Western America and the eastern Pacific islands , yet many fishes range from the Pacific into the Indian Ocean , and many ...
... faunas . Although so few marine animals are common to the above - named three approximate faunas of Eastern and Western America and the eastern Pacific islands , yet many fishes range from the Pacific into the Indian Ocean , and many ...
Contenido
CONTENTS OF VOL | 1 |
CHAPTER X | 48 |
CHAPTER XII | 129 |
Derechos de autor | |
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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