Animal Life and Intelligence

by C. Lloyd Morgan

A

• Abstract ideas, [322], [363]
• Acceleration, sense of, [269]
• Acceleration and retardation, [221]
• Achirus pellucidus, [83]
• Acquired characters, are they transmitted? [147];
  • habits, are they inherited? [436];
  • variations in the intellectual sphere, [497]
• Acræa, [203]
• Activities, organic basis of comparative psychology, [337];
  • of animals, [415];
  • voluntary and involuntary, classification of, [462]
• Adaptation, analogous, [117];
  • modes of, [119];
  • special, examples of, [179];
  • to varying environment, [183]
• Advantage must be particular, [184];
  • must be immediate and not prospective, [186];
  • must be "available," [188], [211]
• Æschna, [289]
• Æsthetic preferences in insects and birds, [207];
  • aspect of sensation, not primary, [243];
  • motive not present to animal consciousness, [409]
• Alexander, Mr. S., "Moral Order and Progress," [463]
• Allen, Mr. Grant, on evolution of flowers, [206];
  • on pleasure and pain, [380]
• Allen, Mr. J. A., on colour and humidity, [164]
• Alternation of generations, [46]
• Amblyopsis spelæus, [271]
• American school of evolutionists, [221]
• Amœba, how it feeds, [5];
  • reproduction of, [12], [38];
  • diagram of, [12];
  • protoplasmic functions of, [142]
• Amphibia, labyrinthodont, [288]
• Anabolism, constructive process, [32]
• Analysis (mental), [321]
• Ancon sheep, [226]
• Anderson, Mr., on one-eared rabbits, [226]
• Anemone, sea, reproduction of, [41];
  • marginal beads of, [298];
  • discrimination by, [359]
• Anger and rage, [389]
• Animal life, nature of, [1];
  • diversity of, [177]
• Animal intelligence, differs generically from man's reason, [350]
• Animals, characteristics of, [1];
  • divided into protozoa and metazoa, [15];
  • and plants, their relation to food-stuffs, the atmosphere, and energy, [15];
  • intelligent not rational, [373];
  • capacities for pleasure and pain, [391]
• Animistic ideas of savages, how developed, [494]
• Anisognathus, [226]
• Anomia, [265]
• Ant, sauba, of South America, [213];
  • sense of taste in, [253];
  • sense of smell in, [258];
  • auditory organ of, [267];
  • intelligence of, [357];
  • activities often described as instinctive, [425];
  • neuter insects, [440];
  • Siamese, [449]
• Antagonism, advantages of, [394]
• Antennæ of insects, modifications of, [178];
  • of emperor moth, [199];
  • organ of hearing in, [267];
  • modified hairs of, [297]
• Antennule of crayfish, [259]
• Anthophora, [438]
• Anticipation, [327]
• Antlers of deer in illustration of growth, [28]
• Aphides, absence of fertilization in reproduction, [44]
• Appetence and aversion, [343], [384]
• Apus, [46]
• Aquatic organisms, respiration in, [4];
  • sense of smell in, [256]
• Arago, M., observation on turnspit dog, [404]
• Arctic hare and fox, [84];
  • animals, colours of, [165];
  • fox, cunning of, [366]
• Argyle, Duke of, on humming-birds, [110]
• Artemia salina and milhausenii, [164]
• Artistic faculties and natural selection, [484];
  • products, evolution of, [489]
• Association a tendency to integration, [183];
  • perceptual and mimicry, [202];
  • and recognition marks, [203]
• Ateles, [210]
• Atmosphere, relations of animals and plants to, [15]
• Attacus, [179]
• Attention, [342]
• Attidæ, [208]
• Auditory apparatus in man, [262]
• Aurelia, life-cycle of, [45]
• Australian mammals and others convergent, [117]
• Automatic action, [415]
• Available advantage, [188], [211]
• Aversion and appetence, [343], [384]