Contributions to the Theory of Natural Selection: A Series of Essays |
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Page 24
We still see remaining an antitypal sketch of a wing adapted for flight in the scaly
flapper of the penguin , and limbs first concealed beneath the skin , and then
weakly protruding from it , were the necessary gradations before others should
be ...
We still see remaining an antitypal sketch of a wing adapted for flight in the scaly
flapper of the penguin , and limbs first concealed beneath the skin , and then
weakly protruding from it , were the necessary gradations before others should
be ...
Page 31
The bird is capable of a very rapid and long - continued flight , so that it can pass
without fatigue over the whole of the district it inhabits , and as soon as the supply
of food begins to fail in one place is able to discover a fresh feeding - ground .
The bird is capable of a very rapid and long - continued flight , so that it can pass
without fatigue over the whole of the district it inhabits , and as soon as the supply
of food begins to fail in one place is able to discover a fresh feeding - ground .
Page 79
But among these there are no wings of Heliconidæ , while those of the large
showy Nymphalidæ , which have a much swifter flight , are often met with . Again
, a gentleman who had recently returned from Brazil stated at a meeting of the ...
But among these there are no wings of Heliconidæ , while those of the large
showy Nymphalidæ , which have a much swifter flight , are often met with . Again
, a gentleman who had recently returned from Brazil stated at a meeting of the ...
Page 80
This property places them somewhat in the position of those curious wingless
birds of oceanic islands , the dodo , the apteryx , and the moas , which are with
great reason supposed to have lost the power of flight on account of the absence
of ...
This property places them somewhat in the position of those curious wingless
birds of oceanic islands , the dodo , the apteryx , and the moas , which are with
great reason supposed to have lost the power of flight on account of the absence
of ...
Page 83
... and have the same mode of flight ; and as they are always very scarce ( Mr .
Bates estimating their numbers at about one to a thousand of the group they
resemble ) , there is hardly a possibility of their being found out by their enemies .
... and have the same mode of flight ; and as they are always very scarce ( Mr .
Bates estimating their numbers at about one to a thousand of the group they
resemble ) , there is hardly a possibility of their being found out by their enemies .
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Common terms and phrases
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 |