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 51
A Series of Essays Alfred Russel Wallace. American polar hare , inhabiting regions of almost perpetual snow , is white all the year round . Other animals inhabiting the same Northern regions do not , however , change colour . The sable ...
A Series of Essays Alfred Russel Wallace. American polar hare , inhabiting regions of almost perpetual snow , is white all the year round . Other animals inhabiting the same Northern regions do not , however , change colour . The sable ...
Page 168
... inhabiting Celebes and the Moluccas are from one - third to one - half greater in extent of wing than the allied species representing them in Java , Su- matra , and Borneo . Six species inhabiting Amboyna are larger than the closely ...
... inhabiting Celebes and the Moluccas are from one - third to one - half greater in extent of wing than the allied species representing them in Java , Su- matra , and Borneo . Six species inhabiting Amboyna are larger than the closely ...
Page 170
... inhabiting India and the Indian region , are tailed , while the two which take their place in the Moluccas , New Guinea , and Australia , P. Polydorus and P. Leodamas , are destitute of tail , the species furthest east having lost this ...
... inhabiting India and the Indian region , are tailed , while the two which take their place in the Moluccas , New Guinea , and Australia , P. Polydorus and P. Leodamas , are destitute of tail , the species furthest east having lost this ...
Contents
Geographical distribution dependent on Geologic Changes A | 4 |
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 allied animals appear beauty become believe birds body brain build butterflies causes Celebes changes character closely colour common comparatively completely concealed consider conspicuous continually direction distinct effect equally evidence exactly example existence explained facts faculties female flowers force further genera genus give greater groups habits imitation important increase India individuals inhabiting insects instinct islands kind known less limited living male materials means mimicry mind mode modifications moths natural selection necessary nest never objects observations occur organic origin Papilio perfect period phenomena possess present probably produced protection prove races reason regions remarkable render resemble result savage seems seen sexes shown similar species structure supposed tail theory tints tion trees true universe variation varied varieties various whole wings