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 xv
... produced by Varia- tion and Selection — The Objection that there are Limits to Variation -Objection to the argument from Classification - The Times on Natural Selection - Intermediate or generalized forms of Extinct Animals an ...
... produced by Varia- tion and Selection — The Objection that there are Limits to Variation -Objection to the argument from Classification - The Times on Natural Selection - Intermediate or generalized forms of Extinct Animals an ...
Page 7
... from the immense number of species which have served as antitypes for the existing spe- cies , and thus produced a complicated branching of the lines of affinity , as intricate as the twigs THE INTRODUCTION OF NEW SPECIES . 7.
... from the immense number of species which have served as antitypes for the existing spe- cies , and thus produced a complicated branching of the lines of affinity , as intricate as the twigs THE INTRODUCTION OF NEW SPECIES . 7.
Page 9
... producing several representative or analogous groups . The Sylviada of Europe and the Sylvicolidæ of North America , the Heliconidae of South America and the Euploas of the East , the group of Tro- gons inhabiting Asia , and that ...
... producing several representative or analogous groups . The Sylviada of Europe and the Sylvicolidæ of North America , the Heliconidae of South America and the Euploas of the East , the group of Tro- gons inhabiting Asia , and that ...
Page 24
... steps by which limbs have been formed ; and that most rudimentary organs have been produced by abortion , owing to disuse , as explained by Mr. Darwin . of them , had we a view of all the 24 ON THE LAW WHICH HAS REGULATED.
... steps by which limbs have been formed ; and that most rudimentary organs have been produced by abortion , owing to disuse , as explained by Mr. Darwin . of them , had we a view of all the 24 ON THE LAW WHICH HAS REGULATED.
Page 26
... produced in a state of domesticity are more or less unstable , and often have a tendency , if left to themselves , to return to the normal form of the parent species ; and this insta- bility is considered to be a distinctive peculiarity ...
... produced in a state of domesticity are more or less unstable , and often have a tendency , if left to themselves , to return to the normal form of the parent species ; and this insta- bility is considered to be a distinctive peculiarity ...
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 |
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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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