CONTENTS 



CHAPTER n ' PAGE 



I. Animal Psychology, the Old and the 



^EW . . . . . . . 9 



II. The Evolution of Parental Care . . 35 



III. The Tropisms and Their Relation to 



More Complex Modes op Behavior . 50 



IV. The Problem of Orientation ... 69 

 V. The Reversal o,f Tropisms • . . 93 



VI. The Beginnings of Intelligence . .120 



VII. Some Considerations on the Problem of 



Learning 139 



VIII. The Implications of Trial and Error . 155 



IX. Behavior and Form 166 



X. The Behavior of Cells . . . .177 



XI. The Instinct of Feigning Death . .197 



XII. The Recognition of Sex . . . .219 



XIII. The Role of Sex in the Evolution of 



Mind 239 



XIV. The Mind of a Monkey . . . .245 

 Index 263 



