CONTENTS. 



CHAPTER PAGE 



L Pbeliminaby Definitions and Illustbations ... ... 1 



IX Some Habits and Instincts of Young Bibds ... 29 



III. Locomotion in Young Bibds ... ... ... ... 59 



IT. FUBTHEB OBSEBVATIONS ON YOUNG BlBDS ... ... 80 



V. OBSEBVATIONS ON YOUNG MAMMALS ... ... ... 101 



VI. The Relation of Consciousness to Instinctive Behavioub 126 



VII. Intelligence and the Acquisition of Habits ... ... 144 



VIH. Imitation ... ... ... ... ... ... 166 



IX. The Emotions in theib Relation to Instinct ... ... 186 



X. Some Habits and Instincts of the Paibtng Season ... 210 



XL Nest-building, Incubation, and Migbation ... ... 232 



XU. The Relation of Obganic to Mental Evolution ... 262 



XHI. Abe Acquibed Habits Inhebited? ... ... ... 280 



XIV. Modification and Vabiation ... ... ... 307 



XV. Hebedity in Man ... ... ... ... ... 323 



Fbontispiece : Gboup of Young Birds, fbom a Drawing by 

 G. E. Lodge. 



