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. |
From inside the book
Results 1-3 of 80
Page 21
... whole field of our geological researches with the earth's surface , but the area of the examined portion of each forma- tion separately with the whole earth . For example , during the Silurian period all the earth was Silurian , and ...
... whole field of our geological researches with the earth's surface , but the area of the examined portion of each forma- tion separately with the whole earth . For example , during the Silurian period all the earth was Silurian , and ...
Page 22
... whole we know . But yet more important is the probability , nay almost the certainty , that whole formations contain- ing the records of vast geological periods are entirely buried beneath the ocean , and for ever beyond our reach ...
... whole we know . But yet more important is the probability , nay almost the certainty , that whole formations contain- ing the records of vast geological periods are entirely buried beneath the ocean , and for ever beyond our reach ...
Page 162
... whole of the phe- nomena and apparent anomalies of the problem to be solved , it is reasonable to ask that those who deny the origin of species by variation and selection should grapple with the facts in detail , and show how the ...
... whole of the phe- nomena and apparent anomalies of the problem to be solved , it is reasonable to ask that those who deny the origin of species by variation and selection should grapple with the facts in detail , and show how the ...
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 | |
6 other sections not shown
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