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
... Glacial period -Alternate Glacial periods in the North and South • 129 CHAPTER XIII . GEOGRAPHICAL DISTRIBUTION - continued . Distribution of fresh - water productions - On the inhabitants of oceanic islands — Absence of Batrachians and ...
... Glacial period -Alternate Glacial periods in the North and South • 129 CHAPTER XIII . GEOGRAPHICAL DISTRIBUTION - continued . Distribution of fresh - water productions - On the inhabitants of oceanic islands — Absence of Batrachians and ...
Página 67
... glacial epoch , which forms only a part of one . whole geological period ; and likewise to reflect on the changes of level , on the extreme change of climate , and on the great lapse of time , all included within this same glacial period ...
... glacial epoch , which forms only a part of one . whole geological period ; and likewise to reflect on the changes of level , on the extreme change of climate , and on the great lapse of time , all included within this same glacial period ...
Página 68
... period . It is not , for instance , probable that sediment was de- posited during the whole of the glacial period near the mouth of the Mississippi , within that limit of depth at which marine animals can best flourish : for we know ...
... period . It is not , for instance , probable that sediment was de- posited during the whole of the glacial period near the mouth of the Mississippi , within that limit of depth at which marine animals can best flourish : for we know ...
Página 83
... periods elapsed , as long as , or probably far longer than , the whole interval from the Cambrian age to the present day ... period , but this , judging from the small amount of organic change since the commencement of the Glacial epoch ...
... periods elapsed , as long as , or probably far longer than , the whole interval from the Cambrian age to the present day ... period , but this , judging from the small amount of organic change since the commencement of the Glacial epoch ...
Página 115
... period , which includes the whole glacial epoch , and note how little the specific forms of the inhabitants of the sea have been affected . On the theory of descent , the full meaning of the fossil remains from closely consecutive ...
... period , which includes the whole glacial epoch , and note how little the specific forms of the inhabitants of the sea have been affected . On the theory of descent , the full meaning of the fossil remains from closely consecutive ...
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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