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 49
... Concealment as Influencing Colour . Concealment , more or less complete , is useful to many animals , and absolutely essential to some . Those which have numerous enemies from which they can- not escape by rapidity of motion , find ...
... Concealment as Influencing Colour . Concealment , more or less complete , is useful to many animals , and absolutely essential to some . Those which have numerous enemies from which they can- not escape by rapidity of motion , find ...
Page 57
... concealment is at least one of the causes that enable the race to flourish . Many of the species of Cicindela , or tiger beetle , will illustrate this mode of protection . Our common Cicindela campestris frequents grassy banks , and is ...
... concealment is at least one of the causes that enable the race to flourish . Many of the species of Cicindela , or tiger beetle , will illustrate this mode of protection . Our common Cicindela campestris frequents grassy banks , and is ...
Page 74
... concealment from their prey . Some of these seem to be so com- plete and effectual as to answer all the wants of the race , and lead to the maintenance of the largest pos- sible population . When this is the case , we can well ...
... concealment from their prey . Some of these seem to be so com- plete and effectual as to answer all the wants of the race , and lead to the maintenance of the largest pos- sible population . When this is the case , we can well ...
Contents
Geographical distribution dependent on Geologic Changes A | 1 |
On the Tendency of Varieties to depart indefinitely from | 26 |
Useful Variations will tend to Increase useless or hurtful Variations | 41 |
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 adapted affinity alike Amboyna anal valves animals antennæ appear Bates beautiful become bees beetles birds Borneo brilliant build butterflies caterpillars causes Celebes changes characters closely allied species common concealed curious Danaidæ Darwin Diphilus eggs equally exactly example existence extinct facts faculties favourable female birds flowers genera genus geological groups Guinea habits Heliconidæ imitation India individuals inhabiting insects instinct islands Java larvæ Lepidoptera less Longicorn Malayan male 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 phenomena plumage Polydorus possess present probably produced protection race regions remarkable render resemble savage sexes sexual sexual selection shown similar spots structure Sumatra tail theory of natural Theseus tints tion trees tropical Tropidorhynchus variation varied varieties whole wings yellow