The Origin of Species by Means of Natural Selection,: Or the Preservation of Favoured Races in the Struggle for LifeAppleton, 1898 - 432 páginas |
Dentro del libro
Resultados 11-15 de 15
Página 273
... Cambrian system was deposited , why do we not find beneath this system great piles of strata stored with the remains of the pro- genitors of the Cambrian fossils ? For on the theory , such strata must somewhere have been deposited at ...
... Cambrian system was deposited , why do we not find beneath this system great piles of strata stored with the remains of the pro- genitors of the Cambrian fossils ? For on the theory , such strata must somewhere have been deposited at ...
Página 275
... Cambrian formation , I can recur only to the hypothesis given in the tenth chapter ; namely , that though our continents and oceans have endured for an encrmous period in nearly their present relative posi- tions , we have no reason to ...
... Cambrian formation , I can recur only to the hypothesis given in the tenth chapter ; namely , that though our continents and oceans have endured for an encrmous period in nearly their present relative posi- tions , we have no reason to ...
Página 304
... Cambrian system was deposited , they seem to me to become ennobled . Judging from the past , we may safely infer that not one living species will transmit its unaltered likeness to a distant futurity . And of the species now living very ...
... Cambrian system was deposited , they seem to me to become ennobled . Judging from the past , we may safely infer that not one living species will transmit its unaltered likeness to a distant futurity . And of the species now living very ...
Página 309
... CAMBRIAN SYSTEM . - A Series of very ancient Palæozoic rocks , between the Laurentian and the Silurian . Until recently these were regarded as the oldest fossiliferous rocks . CANIDE . ― The Dog - family , including the Dog , Wolf , Fox ...
... CAMBRIAN SYSTEM . - A Series of very ancient Palæozoic rocks , between the Laurentian and the Silurian . Until recently these were regarded as the oldest fossiliferous rocks . CANIDE . ― The Dog - family , including the Dog , Wolf , Fox ...
Página 327
... Cambrian , ii . 84 . tions , ii 28 . of crossed varieties , ii . 34 . Fir - trees destroyed by cattle , i . 88 . , pollen of , i . 257 . Fish , flying , i . 218 . teleostean , sudden appearance of , ii . 81 . eating seeds , ii . 146 ...
... Cambrian , ii . 84 . tions , ii 28 . of crossed varieties , ii . 34 . Fir - trees destroyed by cattle , i . 88 . , pollen of , i . 257 . Fish , flying , i . 218 . teleostean , sudden appearance of , ii . 81 . eating seeds , ii . 146 ...
Otras ediciones - Ver todas
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