CONTENTS

CHAPTER I
ORGANIC BEHAVIOUR
PAGE
I.Behaviour in General1
II.Behaviour of Cells3
III.Corporate Behaviour14
IV.The Behaviour of Plants24
V.Reflex Action31
VI.The Evolution of Organic Behaviour35
CHAPTER II
CONSCIOUSNESS
I.The Conscious Accompaniments of Certain Organic Changes42
II.The Early Stages of Mental Development48
III.Later Phases in Mental Development56
IV.The Evolution of Consciousness61
CHAPTER III
INSTINCTIVE BEHAVIOUR
I.Definition of Instinctive Behaviour63
II.Instinctive Behaviour in Insects71
III.The Instinctive Behaviour of Young Birds84
IV.The Conscious Aspect of Instinctive Behaviour98
V.The Evolution of Instinctive Behaviour106
CHAPTER IV
INTELLIGENT BEHAVIOUR
I.The Nature of Intelligent Behaviour117
II.Intelligent Behaviour in Insects123
III.Some Results of Experiment134
IV.The Evolution of Intelligent Behaviour155
V.The Influence of Intelligence on Instinct168
CHAPTER V
SOCIAL BEHAVIOUR
I.Imitation179
II.Intercommunication193
III.Social Communities of Bees and Ants205
IV.Animal Tradition220
V.The Evolution of Social Behaviour225
CHAPTER VI
THE FEELINGS AND EMOTIONS
I.Impulse, Interest, and Emotion235
II.Play248
III.Courtship258
IV.Animal “Æsthetics” and “Ethics”270
V.The Evolution of Feeling and Emotion282
CHAPTER VII
THE EVOLUTION OF ANIMAL BEHAVIOUR
I.The Physiological Aspect295
II.The Biological Aspect305
III.The Psychological Aspect315
IV.Continuity in Evolution324
Index338