x CONTENTS OF THE THIRD VOLUME. 



PAUK 



CHAPTER III. DISCOVERY OF THE MOTION OF THE CHYLE, 



AND CONSEQUENT SPECULATIONS. 



Sect. 1. The Discovery of the Motion of the Chyle . 447 



Sect. 2. The consequent Speculations. Hypotheses of 



Digestion ...... 450 



CHAPTER IV. EXAMINATION OF THE PROCESS OF REPRO- 

 DUCTION IN ANIMALS AND PLANTS, AND CONSEQUENT 

 SPECULATIONS. 



Sect. 1. The Examination of the Process of Reproduction 



in Animals ...... 452 



Sect. 2. The Examination of the Process of Reproduction 



in Vegetables ..... 455 



Sect. 3. The consequent Speculations. Hypotheses of 



Generation ...... 459 



CHAPTER V. EXAMINATION OF THE NERVOUS SYSTEM, AND 



CONSEQUENT SPECULATIONS. 



Sect. 1. The Examination of the Nervous System . 464 



Sect. 2. The consequent Speculations. Hypotheses re- 

 specting Life, Sensation, and Volition . . 468 



CHAPTER VI. INTRODUCTION OF THE PRINCIPLE OF DEVE- 

 LOPED AND METAMORPHOSED SYMMETRY. 



Sect. 1. Vegetable Morphology. Gothe. De Candolle 475 

 Sect. 2. Application of Vegetable Morphology . . 484 



CHAPTER VII. PROGRESS OF ANIMAL MORPHOLOGY. 



Sect. 1. Rise of Comparative Anatomy . . . 487 



Sect. 2. Distinction of the General Types of the Forms of 



Animals. Cuvier 492 



Sect. 3. Attempts to Establish the Identity of the Types 



of Animal Forms 495 



CHAPTER VIII. THE DOCTRINE OF FINAL CAUSES IN 

 PHYSIOLOGY. 



Sect. 1.. Assertion of the Principle of Unity of Plan . 499 



Sect. 2. Estimate of the Doctrine of Unity of Plan . 506 

 Sect. 3. Establishment and Application of the Principle of 



the Conditions of Existence of Animals. Cuvier 515 



