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 iii
... limited circulation , I believe that the larger portion of this volume will be new to many of my friends and to most of my readers . I now wish to say a few words on the reasons which have led me to publish this work . The second essay ...
... limited circulation , I believe that the larger portion of this volume will be new to many of my friends and to most of my readers . I now wish to say a few words on the reasons which have led me to publish this work . The second essay ...
Page v
... limited powers have , it is true , enabled me now and then to seize on some conspicuous group of unappropriated facts , and to search out some gene- ralization which might bring them under the reign of known law ; but they are not ...
... limited powers have , it is true , enabled me now and then to seize on some conspicuous group of unappropriated facts , and to search out some gene- ralization which might bring them under the reign of known law ; but they are not ...
Page 4
... limited dis- trict . 2. In widely distributed families the genera are often limited in range ; in widely distributed genera , well marked groups of species are peculiar to each geographical district . 3. When a group is confined to one ...
... limited dis- trict . 2. In widely distributed families the genera are often limited in range ; in widely distributed genera , well marked groups of species are peculiar to each geographical district . 3. When a group is confined to one ...
Page 10
... limited , flora . On the other hand , no example is known of an island which can be proved geologically to be of very recent origin ( late in the Tertiary , for instance ) , and yet possesses generic or family groups , or even many ...
... limited , flora . On the other hand , no example is known of an island which can be proved geologically to be of very recent origin ( late in the Tertiary , for instance ) , and yet possesses generic or family groups , or even many ...
Page 14
... limited range . To discover how the extinct species have from time to time been replaced by new ones down to the very latest geological period , is the most difficult , and at the same time the most interesting problem in the natural ...
... limited range . To discover how the extinct species have from time to time been replaced by new ones down to the very latest geological period , is the most difficult , and at the same time the most interesting problem in the natural ...
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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 |
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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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