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 9
... Asia , and that peculiar to South America , are examples that may be accounted for in this manner . Such phænomena as are exhibited by the Gala- pagos Islands , which contain little groups of plants and THE INTRODUCTION OF NEW SPECIES . 9.
... Asia , and that peculiar to South America , are examples that may be accounted for in this manner . Such phænomena as are exhibited by the Gala- pagos Islands , which contain little groups of plants and THE INTRODUCTION OF NEW SPECIES . 9.
Page 10
... 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 species peculiar to itself . When a range of ...
... 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 species peculiar to itself . When a range of ...
Page 11
... example of this , its separation from the continent being geologically very recent , and we have consequently scarcely a species which is pecu- liar to it ; while the Alpine range , one of the most Our recent mountain elevations ...
... example of this , its separation from the continent being geologically very recent , and we have consequently scarcely a species which is pecu- liar to it ; while the Alpine range , one of the most Our recent mountain elevations ...
Page 12
... examples ; -the Goliathi of Africa , the Ornithoptera of the Indian Islands , the Heliconidæ of South America , the Danaidæ of the East , and in all , the most closely allied species found in geographical proximity . The question forces ...
... examples ; -the Goliathi of Africa , the Ornithoptera of the Indian Islands , the Heliconidæ of South America , the Danaidæ of the East , and in all , the most closely allied species found in geographical proximity . The question forces ...
Page 21
... example , during the Silurian period all the earth was Silurian , and animals were living and dying , and depositing their remains more or less over the whole area of the globe , and they were probably ( the species at least ) nearly as ...
... example , during the Silurian period all the earth was Silurian , and animals were living and dying , and depositing their remains more or less over the whole area of the globe , and they were probably ( the species at least ) nearly as ...
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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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