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 122
... closely allied , than it is at present , to the northern half . In a similar manner we know , from Falconer and Cautley's discoveries , that Northern India was formerly more closely related in its mammals to Africa than it is at the ...
... closely allied , than it is at present , to the northern half . In a similar manner we know , from Falconer and Cautley's discoveries , that Northern India was formerly more closely related in its mammals to Africa than it is at the ...
Página 158
... closely allied forms now living in marine areas completely sundered . Thus , I think , we can under- stand the presence of some closely allied , still existing and extinct tertiary forms , on the eastern and western shores of temperate ...
... closely allied forms now living in marine areas completely sundered . Thus , I think , we can under- stand the presence of some closely allied , still existing and extinct tertiary forms , on the eastern and western shores of temperate ...
Página 194
... closely allied or representative species occur , there will likewise be found some identical species ; and wherever many closely - allied species occur , there will be found many forms which some naturalists rank as distinct species ...
... closely allied or representative species occur , there will likewise be found some identical species ; and wherever many closely - allied species occur , there will be found many forms which some naturalists rank as distinct species ...
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