Contributions to the Theory of Natural Selection: A Series of EssaysMacmillan, 1871 - 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
... organic life of the earth has undergone a corresponding alteration . This alteration also has been gradual , but complete ; after a certain interval not a single species existing which had lived at the commence- ment of the period ...
... organic life of the earth has undergone a corresponding alteration . This alteration also has been gradual , but complete ; after a certain interval not a single species existing which had lived at the commence- ment of the period ...
Page 3
... organic world is clearly derived by a natural process of gradual extinction and creation of species from that of the latest geological periods . We may therefore safely infer a like gradation and natural sequence from one geological ...
... organic world is clearly derived by a natural process of gradual extinction and creation of species from that of the latest geological periods . We may therefore safely infer a like gradation and natural sequence from one geological ...
Page 4
... Organic Geography and Geology give the main facts on which the hypothesis is founded . Geography . 1. Large groups , such as classes and orders , are generally spread over the whole earth , while smaller ones , such as families and ...
... Organic Geography and Geology give the main facts on which the hypothesis is founded . Geography . 1. Large groups , such as classes and orders , are generally spread over the whole earth , while smaller ones , such as families and ...
Page 5
... organic world in time is very similar to its present distribution in space . 6. Most of the larger and some small groups ex- tend through several geological periods . 7. In each period , however , there are peculiar groups , found ...
... organic world in time is very similar to its present distribution in space . 6. Most of the larger and some small groups ex- tend through several geological periods . 7. In each period , however , there are peculiar groups , found ...
Page 6
... be compound , and can only be represented by a forked or many branched line . Now , all at- tempts at a Natural classification and arrangement of organic beings show , that both these plans have 6 ON THE LAW WHICH HAS REGULATED.
... be compound , and can only be represented by a forked or many branched line . Now , all at- tempts at a Natural classification and arrangement of organic beings show , that both these plans have 6 ON THE LAW WHICH HAS REGULATED.
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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 Amboyna anal valves animals antennæ appear beautiful become bees beetles believe birds Borneo brain build butterflies caterpillars causes Celebes changes character colour concealed conspicuous Crown 8vo curious Danaidæ Darwin Diphilus direction distinct Edition eggs essay exactly existence external extinct Extra fcap facts faculties favourable Fcap flowers genera genus geological groups habits Heliconidæ imitation India individuals inhabiting insects instinct islands Java larvæ Lepidoptera less Malayan male materials mental mimic mimicry mode modified Moluccas moths natural selection nectary nest never observations occur organic Origin of Species Ormenus Pammon Papilio Papilio Ulysses Papilionidæ peculiar perfect phenomena POEMS Polydorus possess present probably produced Professor protection races reason 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 young birds
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