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 18
... tropical regions , as exem- plified by the great distance beyond the tropics to which tropical forms penetrate when the climate is equable , and also by the richness in species and forms of tropical mountain regions which principally ...
... tropical regions , as exem- plified by the great distance beyond the tropics to which tropical forms penetrate when the climate is equable , and also by the richness in species and forms of tropical mountain regions which principally ...
Page 85
... tropics form in fact one great group with the Heliconidæ . They have the same general form , structure , and habits ... tropical Africa there is a peculiar group of the genus Danais , characterized by dark - brown and bluish - white ...
... tropics form in fact one great group with the Heliconidæ . They have the same general form , structure , and habits ... tropical Africa there is a peculiar group of the genus Danais , characterized by dark - brown and bluish - white ...
Page 189
... tropical regions of the earth . From all Africa only 33 species of Papilio are known ; but as several are still undescribed in collec- tions , we may raise their number to about 40. In all tropical Asia there are at present described ...
... tropical regions of the earth . From all Africa only 33 species of Papilio are known ; but as several are still undescribed in collec- tions , we may raise their number to about 40. In all tropical Asia there are at present described ...
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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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