Contributions to the Theory of Natural Selection: A Series of EssaysMacmillan and Company, 1870 - 384 pages |
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Page 2
... appears to have occurred several times : -That from the last of the geological epochs to the present or historical epoch , the change of organic life has been gradual : the first appearance of animals now existing can in many cases be ...
... appears to have occurred several times : -That from the last of the geological epochs to the present or historical epoch , the change of organic life has been gradual : the first appearance of animals now existing can in many cases be ...
Page 9
... appear isolated . If in any case the antitype had an extensive range , two or more groups of species might have been formed , cach varying from it in a different manner , and thus producing several representative or analogous groups ...
... appear isolated . If in any case the antitype had an extensive range , two or more groups of species might have been formed , cach varying from it in a different manner , and thus producing several representative or analogous groups ...
Page 13
... appears to have been as gradual in time as in space . Geology , how- ever , furnishes us with positive proof of the extinc- tion and production of species , though it does not inform us how either has taken place . The extinction of ...
... appears to have been as gradual in time as in space . Geology , how- ever , furnishes us with positive proof of the extinc- tion and production of species , though it does not inform us how either has taken place . The extinction of ...
Page 15
... appear to some readers essentially a theory of progression , it is in reality only one of gradual change . It is , however , by no means difficult to show that a real progression in the scale of organization is perfectly consistent with ...
... appear to some readers essentially a theory of progression , it is in reality only one of gradual change . It is , however , by no means difficult to show that a real progression in the scale of organization is perfectly consistent with ...
Page 16
... appear to apply to the case of the Mollusca , which , at a very early period , had reached a high organi- zation and a great development of forms and species in the testaceous Cephalopoda . In each succeeding age modified species and ...
... appear to apply to the case of the Mollusca , which , at a very early period , had reached a high organi- zation and a great development of forms and species in the testaceous Cephalopoda . In each succeeding age modified species and ...
Other editions - View all
Contributions to the Theory of Natural Selection: A Series of Essays ... Alfred Russel Wallace No preview available - 2018 |
Contributions to the Theory of Natural Selection: A Series of Essays Alfred Russel Wallace No preview available - 2016 |
Common terms and phrases
abundant action adapted alike animals antenn¿ appear beautiful become beetles birds Borneo brain brilliant build butterflies caterpillars causes Celebes changes character closely allied species colour concealed conspicuous Crown 8vo curious Danaida Darwin Diphilus distinct Edition eggs equally essay evidence exactly existence external extinct Extra fcap facts faculties favourable Fcap flowers genera genus geological groups Guinea habits Heliconid¿ imitation India individuals inhabiting insects instinct islands Java larv¿ Lepidoptera less Malayan male Mimeta mimic mimicry mode modified Moluccas moths natural selection nectary nest never nidification number of species observations occur organic Origin of Species Ormenus Pammon Papilio Papilio Ulysses Papilionid¿ peculiar perfect period phenomena POEMS Polydorus possess present probably produced protection race regions remarkable render resemble savage sexes sexual sexual selection shown structure Sumatra tail theory of natural Theseus tints tion trees tropical variation varied varieties whole wings
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