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 262
... flowers is shown by the striking fact , that those flowers which can be perfectly fertilized by the wind , and do not need the aid of insects , rarely or never have gaily- coloured flowers . This wide extension of the general principle ...
... flowers is shown by the striking fact , that those flowers which can be perfectly fertilized by the wind , and do not need the aid of insects , rarely or never have gaily- coloured flowers . This wide extension of the general principle ...
Page 270
... flowers of Orchids cannot be necessary per se , since exactly the same end is gained in ten thousand other flowers which do not possess them . Is it not then an extraordinary idea , to imagine the Creator of the Universe contriving the ...
... flowers of Orchids cannot be necessary per se , since exactly the same end is gained in ten thousand other flowers which do not possess them . Is it not then an extraordinary idea , to imagine the Creator of the Universe contriving the ...
Page 273
... flowers because they could not get a satisfying supply of nec- tar , and if these were the only moths in the country the flowers would undoubtedly suffer , and the further growth of the nectary be checked by exactly the same . process ...
... flowers because they could not get a satisfying supply of nec- tar , and if these were the only moths in the country the flowers would undoubtedly suffer , and the further growth of the nectary be checked by exactly the same . process ...
Contents
Geographical distribution dependent on Geologic Changes A | 1 |
On the Tendency of Varieties to depart indefinitely from | 26 |
onlyCause of the dull Colours of Female BirdsUse of the gaudy | 129 |
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 action adapted affinity Amboyna anal valves animals antennæ appear beauty become beetles birds Borneo brain brilliant build butterflies caterpillars causes Celebes changes character closely allied species colour concealed conspicuous curious Danaidæ Darwin Diphilus distinct eggs equally evidence exactly existence external extinct facts faculties favourable female birds flowers genera genus geological groups Guinea habits hairy harmony Heliconidæ imitation India individuals inhabiting insects instinct islands Java larvæ Lepidoptera less Malayan male mental 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 perfect phenomena Polydorus possess present probably produced protection races regions remarkable render resemble savage sexes sexual sexual selection shown structure Sumatra tail theory of natural Theseus tints tion trees tropical Tropidorhynchus variation varied varieties whole wings yellow