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 15
... organization is perfectly consistent with all the appearances , and even with apparent retrogression , should such occur . Returning to the analogy of a branching tree , as the best mode of representing the natural arrange- ment of ...
... organization is perfectly consistent with all the appearances , and even with apparent retrogression , should such occur . Returning to the analogy of a branching tree , as the best mode of representing the natural arrange- ment of ...
Page 33
... organization are the least capa- ble of counteracting the vicissitudes of food - supply , & c . , must diminish in numbers , and , in extreme cases , become altogether extinct . Between these ex- tremes the species will present various ...
... organization are the least capa- ble of counteracting the vicissitudes of food - supply , & c . , must diminish in numbers , and , in extreme cases , become altogether extinct . Between these ex- tremes the species will present various ...
Page 204
... organization or of habit . The colt or calf is said to walk instinctively , almost as soon as it is born ; but this is solely due to its organization , which ren- ders walking both possible and pleasurable to it . So we are said ...
... organization or of habit . The colt or calf is said to walk instinctively , almost as soon as it is born ; but this is solely due to its organization , which ren- ders walking both possible and pleasurable to it . So we are said ...
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