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nydus/Contributions to the Theory of Natural SelectionPublic

This volume collects essays written by Alfred Russel Wallace regarding his independent discovery and development of the theory of natural selection. The author provides corrected and expanded versions of his previous scientific writings to demonstrate the scope and application of his findings.

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Table of Contents

INDEX.

  • Picidæ, sexual colouring and nidification of, 242.
  • Pipridæ, sexual colouring and nidification of, 245.
  • Pittidæ, 253.
  • Pliocerus equalis, 101; P. elapoides, P. euryzonus, 102.
  • Pæciloderma terminale, 93.
  • Polarity, Forbes’ theory of, 17, 45.
  • Polymorphism, 145; illustration of, 157.
  • Population of species, law of, 28; does not permanently increase, 29; not determined by abundance of offspring, 29; checks to, 30; difference in the case of cats and rabbits explained, 32.
  • Prevision, a case of, 122.
  • Prioniturus, 196.
  • Protection, various modes in which animals obtain it, 69-71, 258; greater need of, in female insects and birds, 113.
  • Protective colouring, theory of, 65.
  • Psittaci (Parrots), sexual colouring and nidification of, 242.
  • Pterosauria, 298.
  • Ptychoderes, 94.
  • RACES, or subspecies, 160; of man, origin of, 319.
  • Redbreast and woodpigeon, protective colouring of, 53, 54.
  • Representative groups, 9; of Trogons, butterflies, &c., 12.
  • Reptiles, protective colouring of, 54.
  • Rhamphastidæ, sexual colouring and nidification of, 242.
  • Rhinoceros, 299.
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