Contributions to the Theory of Natural Selection: A Series of EssaysMacmillan and Company, 1870 - 384 pages |
From inside the book
Page 30
... seems at least highly probable , and is perhaps under rather than over the truth . It would therefore ap- pear that , as far as the continuance of the species and the keeping up the average number of indi- viduals are concerned , large ...
... seems at least highly probable , and is perhaps under rather than over the truth . It would therefore ap- pear that , as far as the continuance of the species and the keeping up the average number of indi- viduals are concerned , large ...
Page 33
... seems evident that what takes place among the individuals of a species must also occur among the several allied species of a group , -viz . , that those which are best adapted to obtain a regular supply of food , and to defend ...
... seems evident that what takes place among the individuals of a species must also occur among the several allied species of a group , -viz . , that those which are best adapted to obtain a regular supply of food , and to defend ...
Page 41
... seems to have been considered that when this was done the whole question has been finally settled ; but the view here developed renders such hypothesis quite un- necessary , by showing that similar results must be produced by the action ...
... seems to have been considered that when this was done the whole question has been finally settled ; but the view here developed renders such hypothesis quite un- necessary , by showing that similar results must be produced by the action ...
Page 56
... seems to be in pro- portion to their sluggish motions or the absence of other means of defence , that insects possess the pro- tective colouring . In the tropics there are thousands of species of insects which rest during the day cling ...
... seems to be in pro- portion to their sluggish motions or the absence of other means of defence , that insects possess the pro- tective colouring . In the tropics there are thousands of species of insects which rest during the day cling ...
Page 65
... seems to be no inherent tendency to avoid white , for directly they are domesticated white varieties arise , and appear to thrive as well as others . We have white mice and rats , white F cats , horses , dogs , and cattle , white ...
... seems to be no inherent tendency to avoid white , for directly they are domesticated white varieties arise , and appear to thrive as well as others . We have white mice and rats , white F cats , horses , dogs , and cattle , white ...
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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