TABLE OF CONTENTS 



CHAPTER I 



PAGES 



THE DIFFICULTIES AND METHODS OF COMPARATIVE PSY- 

 CHOLOGY . 1-26 



i. Difficulties. 2. Methods of Obtaining Facts: An- 

 ecdote. 3. Methods of Obtaining Facts: Experiment. 



4. Methods of Obtaining Facts: the Ideal Method. 



5. Methods of Interpreting Facts. 



CHAPTER II 



THE EVIDENCE OF MIND 27-37 



6. Inferring Mind from Behavior. 7. Inferring Mind 

 from Structure. 



CHAPTER III 



THE MIND OF THE SIMPLEST ANIMALS 38-52 



8. The Structure and Behavior of Amoeba. 9. The Mind 

 of Amoeba. 



CHAPTER IV 

 SENSORY DISCRIMINATION: METHODS OF INVESTIGATION . . 53-62 



10. Preliminary Considerations, n. Structure as Evi- 

 dence of Discrimination. 12. Behavior as Evidence of 

 Discrimination. 13. Evidence from Structure and Behavior 

 Combined. 14. Evidence for Discrimination of Certain 

 "Lower" Sensation Classes. 



CHAPTER V 

 SENSORY DISCRIMINATION: THE CHEMICAL SENSE . . . 63-115 



15. The Chemical Sense in Protozoa. 16. The Chemical 

 Sense in Ccelenterates. 17. The Chemical Sense in Flat- 



b 



