Contributions to the Theory of Natural Selection: A Series of Essays |
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Page 2
This alteration also has been gradual , but complete ; after a certain interval not a
single species existing which had lived at the commencement of the period . This
complete renewal of the forms of life also appears to have occurred several ...
This alteration also has been gradual , but complete ; after a certain interval not a
single species existing which had lived at the commencement of the period . This
complete renewal of the forms of life also appears to have occurred several ...
Page 14
... 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 a complete solution of it .
... 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 a complete solution of it .
Page 20
... former period was much less than at present ; at all events the aquatic portion ,
with which geologists have most acquaintance , was probably often as great or
greater . Now we know that there have been many complete changes of species
...
... former period was much less than at present ; at all events the aquatic portion ,
with which geologists have most acquaintance , was probably often as great or
greater . Now we know that there have been many complete changes of species
...
Page 23
The minute limbs hidden beneath the skin in many of the snake - like lizards , the
anal hooks of the boa constrictor , the complete series of jointed finger - bones in
the paddle of the Manatus and whale , are a few of the most familiar instances .
The minute limbs hidden beneath the skin in many of the snake - like lizards , the
anal hooks of the boa constrictor , the complete series of jointed finger - bones in
the paddle of the Manatus and whale , are a few of the most familiar instances .
Page 24
Many more of these modifications should we behold , and more complete series
of them , had we a view of all the. * The theory of Natural Selection has now
taught us that these are not the steps by which limbs have been formed ; and that
...
Many more of these modifications should we behold , and more complete series
of them , had we a view of all the. * The theory of Natural Selection has now
taught us that these are not the steps by which limbs have been formed ; and that
...
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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 |