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 147
... Pammon offers a somewhat similar case . The female was described by Linnæus as P. Polytes , and was considered to be a distinct species till Wes- termann bred the two from the same larvæ ( see Boisduval , " Species Général des ...
... Pammon offers a somewhat similar case . The female was described by Linnæus as P. Polytes , and was considered to be a distinct species till Wes- termann bred the two from the same larvæ ( see Boisduval , " Species Général des ...
Page 148
... Pammon is found , a female resembling P. Polytes also occurs , and sometimes , though less frequently than on the continent , another female closely resembling the male : while not only has no male specimen of P. Polytes yet been ...
... Pammon is found , a female resembling P. Polytes also occurs , and sometimes , though less frequently than on the continent , another female closely resembling the male : while not only has no male specimen of P. Polytes yet been ...
Page 150
... Pammon group ; and though , from the peculiar mark- ing of the fore wings , it has at first sight a very dif- ferent aspect , yet a closer examination shows that every one of its markings could be produced by slight and almost ...
... Pammon group ; and though , from the peculiar mark- ing of the fore wings , it has at first sight a very dif- ferent aspect , yet a closer examination shows that every one of its markings could be produced by slight and almost ...
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