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 5
... closely allied families , genera and species peculiar to the other . Geology . 5. The distribution of the organic world in time is very similar to its present distribution in space . 6. Most of the larger and some small groups ex- tend ...
... closely allied families , genera and species peculiar to the other . Geology . 5. The distribution of the organic world in time is very similar to its present distribution in space . 6. Most of the larger and some small groups ex- tend ...
Page 12
... closely allied species being often found in the same or closely adjoining districts , as we have had the good fortune of personally verifying . Fishes give evidence of a similar kind : each great river has its peculiar genera , and in ...
... closely allied species being often found in the same or closely adjoining districts , as we have had the good fortune of personally verifying . Fishes give evidence of a similar kind : each great river has its peculiar genera , and in ...
Page 168
... closely allied forms of the northern Moluccas and New Guinea by about one - sixth . These include almost every case in which closely allied species can be compared . Species of Papilionidæ of the Moluccas and Celebes ( large ) ...
... closely allied forms of the northern Moluccas and New Guinea by about one - sixth . These include almost every case in which closely allied species can be compared . Species of Papilionidæ of the Moluccas and Celebes ( large ) ...
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