Contributions to the Theory of Natural Selection: A Series of EssaysMacmillan and Company, 1870 - 384 pages |
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Page 19
... explained . We thus have a clue to the increase of the forms of life during certain periods , and their decrease during others , without recourse Professor Ramsay has since shown that a glacial epoch probably occurred at the time of the ...
... explained . We thus have a clue to the increase of the forms of life during certain periods , and their decrease during others , without recourse Professor Ramsay has since shown that a glacial epoch probably occurred at the time of the ...
Page 24
... the steps by which limbs have been formed ; and that most rudimentary organs have been produced by abortion , owing to disease , as explained by Mr. Darwin . of them , had we a view of all the 24 ON THE LAW WHICH HAS REGULATED.
... the steps by which limbs have been formed ; and that most rudimentary organs have been produced by abortion , owing to disease , as explained by Mr. Darwin . of them , had we a view of all the 24 ON THE LAW WHICH HAS REGULATED.
Page 25
... explained and illus- trated by it , in 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 ...
... explained and illus- trated by it , in 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 ...
Page 38
... explained . Let us now turn to domesticated animals , and in- quire how varieties produced among them are affected by the principles here enunciated . The essential difference in the condition of wild and domestic animals is this ...
... explained . Let us now turn to domesticated animals , and in- quire how varieties produced among them are affected by the principles here enunciated . The essential difference in the condition of wild and domestic animals is this ...
Page 42
... explained on the same principle ; for though in the course of ages varieties of many tints may have occurred , yet those races having colours best adapted to concealment from their enemies would inevitably survive the longest . We have ...
... explained on the same principle ; for though in the course of ages varieties of many tints may have occurred , yet those races having colours best adapted to concealment from their enemies would inevitably survive the longest . We have ...
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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