Contributions to the Theory of Natural Selection: A Series of EssaysMacmillan and Company, 1870 - 384 pages |
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Page 40
... action , and in a few generations revert to a common type , which must be that in which the various powers and faculties are so proportioned to each other as to be best adapted to procure food and secure safety , that in which by the ...
... action , and in a few generations revert to a common type , which must be that in which the various powers and faculties are so proportioned to each other as to be best adapted to procure food and secure safety , that in which by the ...
Page 41
... action of principles constantly at work in nature . The powerful retractile talons of the falcon- and the cat - tribes have not been produced or increased by the volition of those animals ; but among the different varieties which ...
... action of principles constantly at work in nature . The powerful retractile talons of the falcon- and the cat - tribes have not been produced or increased by the volition of those animals ; but among the different varieties which ...
Page 42
... action of this principle is exactly like that of the centrifugal governor of the steam engine , which checks and corrects any irregularities almost before they become evident ; and in like manner no unbalanced deficiency in the animal ...
... action of this principle is exactly like that of the centrifugal governor of the steam engine , which checks and corrects any irregularities almost before they become evident ; and in like manner no unbalanced deficiency in the animal ...
Page 48
... action of climate , soil , or food . Where the former explanation has been accepted , it has completely checked inquiry , since we could never get any further than the fact of the adaptation . There was nothing more to be known about ...
... action of climate , soil , or food . Where the former explanation has been accepted , it has completely checked inquiry , since we could never get any further than the fact of the adaptation . There was nothing more to be known about ...
Page 70
... continue their action almost unchecked . It is perhaps in insects that we may best study the varied means by which animals are defended or con- cealed . One of the uses of the phosphorescence with 70 MIMICRY , AND OTHER PROTECTIVE.
... continue their action almost unchecked . It is perhaps in insects that we may best study the varied means by which animals are defended or con- cealed . One of the uses of the phosphorescence with 70 MIMICRY , AND OTHER PROTECTIVE.
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 Amboyna animals antennæ appear beautiful become bees beetles birds Borneo brain brilliant build butterflies caterpillars causes Celebes changes character closely allied species colour concealed conspicuous Crown 8vo curious Darwin Diphilus distinct Edition eggs essay evidence exactly existence external extinct Extra fcap facts faculties favourable Fcap flowers genera genus geological groups Guinea habits Heliconidæ imitation India individuals inhabiting insects instinct islands Java larvæ 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 Papilionidæ 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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