The Origin of Species by Means of Natural Selection,: Or the Preservation of Favoured Races in the Struggle for LifeAppleton, 1898 - 432 páginas |
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Página vi
... fresh - water productions - On the inhabitants of oceanic islands — Absence of Batrachians and of terrestrial Mam- mals - On the relation of the inhabitants of islands to those of the nearest mainland - On colonisation from the nearest ...
... fresh - water productions - On the inhabitants of oceanic islands — Absence of Batrachians and of terrestrial Mam- mals - On the relation of the inhabitants of islands to those of the nearest mainland - On colonisation from the nearest ...
Página 66
... fresh - water formation in Swit- zerland . Although each formation has indisputably . required a vast number of years for its deposition , sev- eral reasons can be given why each should not commonly include a graduated series of links ...
... fresh - water formation in Swit- zerland . Although each formation has indisputably . required a vast number of years for its deposition , sev- eral reasons can be given why each should not commonly include a graduated series of links ...
Página 101
... fresh water at distant points change in the same parallel manner . We may doubt whether they have thus changed : if the Megatherium , Mylodon , Macrauchenia , and Toxodon had been brought to Europe from La Plata , without any ...
... fresh water at distant points change in the same parallel manner . We may doubt whether they have thus changed : if the Megatherium , Mylodon , Macrauchenia , and Toxodon had been brought to Europe from La Plata , without any ...
Página 117
... fresh - water shells have remained nearly the same , from the time when , as far as is known , they first appeared . It is not an insuperable difficulty that Foraminifera have not , as insisted on by Dr. Carpenter , progressed in ...
... fresh - water shells have remained nearly the same , from the time when , as far as is known , they first appeared . It is not an insuperable difficulty that Foraminifera have not , as insisted on by Dr. Carpenter , progressed in ...
Página 138
... freshwater productions ; and thirdly , the occurrence of the same terrestrial species on islands and on the nearest mainland , though sepa- rated by hundreds of miles of open sea . If the exist- ence of the same species at distant and ...
... freshwater productions ; and thirdly , the occurrence of the same terrestrial species on islands and on the nearest mainland , though sepa- rated by hundreds of miles of open sea . If the exist- ence of the same species at distant and ...
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Términos y frases comunes
admit affinity allied species ancient animals appear Archipelago arctic areas become believe birds Cambrian changes characters cies classification climate closely allied common progenitor 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 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 sediment seeds Silurian South America stage stamens sterility structure successive suppose terrestrial tertiary theory tion variations varieties whilst widely different wings