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
... 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 mammals belongs to the middle of the secondary series ; and true mammals ...
... 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 mammals belongs to the middle of the secondary series ; and true mammals ...
Página 183
... Mammals offer another and similar case . I have carefully searched the oldest voyages , and have not found a single instance , free from doubt , of a terrestrial mammal ( excluding domesticated animals kept by the natives ) inhabiting ...
... Mammals offer another and similar case . I have carefully searched the oldest voyages , and have not found a single instance , free from doubt , of a terrestrial mammal ( excluding domesticated animals kept by the natives ) inhabiting ...
Página 184
... mammals appear and disappear at a quicker rate than other and lower animals . Although terrestrial mammals do not occur on oceanic islands , aerial mammals do occur on almost every island . New Zealand possesses two bats found nowhere ...
... mammals appear and disappear at a quicker rate than other and lower animals . Although terrestrial mammals do not occur on oceanic islands , aerial mammals do occur on almost every island . New Zealand possesses two bats found nowhere ...
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