The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life, Volumen2D. Appleton, 1898 |
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... 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 source with subsequent modification - Summary 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 source with subsequent modification - Summary of ...
Página 86
... oceanic island ( with the exception of New Zealand , if this can be called a truly oceanic island ) is as yet known to afford even a remnant of any palæozoic or secondary formation . Hence we may perhaps infer , that during the ...
... oceanic island ( with the exception of New Zealand , if this can be called a truly oceanic island ) is as yet known to afford even a remnant of any palæozoic or secondary formation . Hence we may perhaps infer , that during the ...
Página 141
... oceanic islands . I freely ad- mit the former existence of many islands , now buried beneath the sea , which may have served as halting - places for plants and for many animals during their migration . In the coral - producing oceans ...
... oceanic islands . I freely ad- mit the former existence of many islands , now buried beneath the sea , which may have served as halting - places for plants and for many animals during their migration . In the coral - producing oceans ...
Página 142
... oceanic islands are likewise opposed to the belief of their former continu- ity with continents . Nor does the almost universally volcanic composition of such islands favour the admis- sion that they are the wrecks of sunken continents ...
... oceanic islands are likewise opposed to the belief of their former continu- ity with continents . Nor does the almost universally volcanic composition of such islands favour the admis- sion that they are the wrecks of sunken continents ...
Página 160
... - direct influence of the eccentricity of the orbit upon oceanic currents . According to Mr. Croll , cold periods But the regularly occur every ten or fifteen thousand years. 160 ALTERNATE GLACIAL PERIODS [ CHAP . XII .
... - direct influence of the eccentricity of the orbit upon oceanic currents . According to Mr. Croll , cold periods But the regularly occur every ten or fifteen thousand years. 160 ALTERNATE GLACIAL PERIODS [ CHAP . XII .
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Términos y frases comunes
admit affinity allied species ancient animals appear Archipelago arctic areas become believe belonging birds Cambrian changes characters cies classification climate closely allied 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 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 palæontologists Palæozoic parent parent-form peculiar perfect pistil plants pollen present probably produced quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs seeds Silurian South America stage stamens sterility structure successive suppose terrestrial tertiary theory tion variations varieties whilst whole widely different wings