Contributions to the Theory of Natural Selection: A Series of Essays |
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Page 9
... and thus made the groups appear isolated . If in any case the antitype had an
extensive range , two or more groups of species might have been formed , each
varying from it in a different manner , and thus producing several representative
or ...
... and thus made the groups appear isolated . If in any case the antitype had an
extensive range , two or more groups of species might have been formed , each
varying from it in a different manner , and thus producing several representative
or ...
Page 14
The present inquiry , which seeks to eliminate from known facts a law which has
determined , to a certain degree , what species could and did appear at a given
epoch , may , it is hoped , be considered as one step in the right direction towards
...
The present inquiry , which seeks to eliminate from known facts a law which has
determined , to a certain degree , what species could and did appear at a given
epoch , may , it is hoped , be considered as one step in the right direction towards
...
Page 15
Now it is believed the present hypothesis will harmonize with all these facts , and
in a great measure serve to explain them ; for though it may appear to some
readers essentially a theory of progression , it is in reality only one of gradual ...
Now it is believed the present hypothesis will harmonize with all these facts , and
in a great measure serve to explain them ; for though it may appear to some
readers essentially a theory of progression , it is in reality only one of gradual ...
Page 16
The foregoing remarks appear to apply to the case of the Mollusca , which , at a
very early period , had reached a high organization and a great development of
forms and species in the testaceous Cephalopoda . In each succeeding age ...
The foregoing remarks appear to apply to the case of the Mollusca , which , at a
very early period , had reached a high organization and a great development of
forms and species in the testaceous Cephalopoda . In each succeeding age ...
Page 30
It would therefore appear that , as far as the continuance of the species and the
keeping up the average number of individuals are concerned , large broods are
superfluous . On the average all above one become food for hawks and kites ,
wild ...
It would therefore appear that , as far as the continuance of the species and the
keeping up the average number of individuals are concerned , large broods are
superfluous . On the average all above one become food for hawks and kites ,
wild ...
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abundant action adapted allied animals appear beautiful become believe birds body build butterflies causes Celebes changes character closely colour common comparatively complete concealment consider conspicuous continually direct distinct doubt Edition equally evidence exactly example existence explained facts female flight flowers frequently further genera genus give greater groups habits imitation important increase India individuals inhabiting insects interesting islands Java kind known less limited living male marked materials means mimicry modifications moths natural selection necessary nest never objects observations occur organic original Papilio perfect period phenomena possess present probably produced protection race reason region remarkable render resemble result savage seems seen sexes shown similar species structure supposed tail theory tints tion trees tropical true universe variation varied varieties various whole wings
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Bibliographic information
| Title | Contributions to the Theory of Natural Selection: A Series of Essays Contributions to the Theory of Natural Selection: A Series of Essays, Alfred Russel Wallace Marilee E. Thomas and Robert C. Thomas Science and Related Subjects Collection |
| Author | Alfred Russel Wallace |
| Edition | 2 |
| Publisher | Macmillan and Company, 1870 |
| Original from | Oxford University |
| Digitized | 8 mai 2006 |
| Length | 384 pages |
| Export Citation | BiBTeX EndNote RefMan |