Contributions to the Theory of Natural Selection: A Series of EssaysAMS Press, 1973 - 384 pages Wallace noticed on expeditions to the Amazon and the Malay archipelego that mammals in Southeast Asia are more advanced than their Australian cousins. His suggestion was that the two continents had split before the better adapted mammals had evolved in Asia. The isolated Australian marsupials were able to thrive, whilst those in Asia were driven to extinction by competition from more advanced mammals. This led to his theory of natural selection, which he presented to the Linnean Society in 1858 with Charles Darwin. This volume reprints those papers presented to the Linnean Society. |
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Page 2
... changes which it has under- gone , and consequently , that to endeavour to explain and account for its present condition without any reference to those changes ( as has frequently been done ) must lead to very imperfect and erroneous ...
... changes which it has under- gone , and consequently , that to endeavour to explain and account for its present condition without any reference to those changes ( as has frequently been done ) must lead to very imperfect and erroneous ...
Page 277
... changes produced year by year , and multiplying them by thousands and ten thousands , after visiting the various regions of the earth and seeing the changes everywhere going on , and the unmistakable signs of greater changes in past ...
... changes produced year by year , and multiplying them by thousands and ten thousands , after visiting the various regions of the earth and seeing the changes everywhere going on , and the unmistakable signs of greater changes in past ...
Page 302
... CHANGES OF ORGANIC FORMS , to keep them in harmony with the Changed Condi- tions ; and as the changes of conditions are perma- nent changes , in the sense of not reverting back to identical previous condi- tions , the changes of or ...
... CHANGES OF ORGANIC FORMS , to keep them in harmony with the Changed Condi- tions ; and as the changes of conditions are perma- nent changes , in the sense of not reverting back to identical previous condi- tions , the changes of or ...
Contents
Geographical distribution dependent on Geologic Changes A | 1 |
On the Tendency of Varieties to depart indefinitely from | 26 |
Useful Variations will tend to Increase useless or hurtful Variations | 41 |
Copyright | |
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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 adapted affinity alike Amboyna anal valves animals antennæ appear Bates beautiful become bees beetles birds Borneo brilliant build butterflies caterpillars causes Celebes changes characters closely allied species common concealed curious Danaidæ Darwin Diphilus eggs equally exactly example existence extinct facts faculties favourable female birds flowers genera genus geological groups Guinea habits Heliconidæ imitation India individuals inhabiting insects instinct islands Java larvæ Lepidoptera less Longicorn Malayan male Mimeta mimic mimicry mode modifications Moluccas moths natural selection nectary nest never nidification number of species observations occur organic Origin of Species Ormenus Pammon Papilio Papilio Ulysses Papilionidæ peculiar phenomena plumage Polydorus possess present probably produced protection race regions remarkable render resemble savage sexes sexual sexual selection shown similar spots structure Sumatra tail theory of natural Theseus tints tion trees tropical Tropidorhynchus variation varied varieties whole wings yellow