Contributions to the Theory of Natural Selection: A Series of EssaysMacmillan and Company, 1870 - 384 pages |
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Page xiii
... perfect Adaptation to the Conditions of Existence- Useful Variations will tend to Increase , useless or hurtful Variations to Diminish - Superior Varieties will ultimately extirpate the Ori- ginal Species - The Partial Reversion of ...
... perfect Adaptation to the Conditions of Existence- Useful Variations will tend to Increase , useless or hurtful Variations to Diminish - Superior Varieties will ultimately extirpate the Ori- ginal Species - The Partial Reversion of ...
Page 7
... perfect group ; -in the actual state of nature it is almost impossible , the species being so numerous and the modifications of form and structure so varied , arising probably from the immense number of species which have served as ...
... perfect group ; -in the actual state of nature it is almost impossible , the species being so numerous and the modifications of form and structure so varied , arising probably from the immense number of species which have served as ...
Page 20
... perfect . Looking at the vast numbers of species and groups that have been discovered by geologists , this may be doubted ; but we should compare their numbers not merely with those that now exist upon the earth , but with a far larger ...
... perfect . Looking at the vast numbers of species and groups that have been discovered by geologists , this may be doubted ; but we should compare their numbers not merely with those that now exist upon the earth , but with a far larger ...
Page 25
... perfect accordance with the vast mass of facts which the researches of modern na- turalists have brought together , and , it is believed , not materially opposed to any of them . It also claims a superiority over previous hypotheses ...
... perfect accordance with the vast mass of facts which the researches of modern na- turalists have brought together , and , it is believed , not materially opposed to any of them . It also claims a superiority over previous hypotheses ...
Page 33
... perfect in health and vigour- those who are best able to obtain food regularly , and avoid their numerous enemies . It is , as we com- menced by remarking , " a struggle for existence , " in which the weakest and least perfectly ...
... perfect in health and vigour- those who are best able to obtain food regularly , and avoid their numerous enemies . It is , as we com- menced by remarking , " a struggle for existence , " in which the weakest and least perfectly ...
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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