I.—Behaviour in General

II.—Behaviour of Cells

III. Corporate Behaviour

IV.—The Behaviour of Plants

V.—Reflex Action

VI.—The Evolution of Organic Behaviour

I.—The Conscious Accompaniments of Certain Organic Changes

II.—The Early Stages of Mental Development

III.—Later Phases in Mental Development

IV.—The Evolution of Consciousness

I.—Definition of Instinctive Behaviour

II.—Instinctive Behaviour in Insects

III.—The Instinctive Behaviour of Young Birds

IV.—The Conscious Aspect of Instinctive Behaviour

V.—The Evolution of Instinctive Behaviour

I.—The Nature of Intelligent Behaviour

II.—Intelligent Behaviour in Insects

III.—Some Results of Experiment

IV.—The Evolution of Intelligent Behaviour

V.—The Influence of Intelligence on Instinct

I.—Imitation

II.—Intercommunication

III.—Social Communities of Bees and Ants

IV.—Animal Tradition

V.—The Evolution of Social Behaviour

I.—Impulse, Interest, and Emotion

II.—Play

III.—Courtship

IV.—Animal “Æsthetics” and “Ethics”

V.—The Evolution of Feeling and Emotion

I.—The Physiological Aspect

II.—The Biological Aspect

III.—The Psychological Aspect

IV.—Continuity in Evolution