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UNIVERSITY 



CONTENTS. 



PAGE 



INTRODUCTION ... i 



CHAPTER I. 



THE ENLARGEMENT OF PARTS FROM INCREASED USE, 



OVERGROWTH AND IRRITATION ... ... ... 14 



CHAPTER II. 

 DISUSE AND ITS EFFECTS... ... ... ... 35 



CHAPTER III. 

 VESTIGIAL PARTS ... ... ... ... ... 60 



CHAPTER IV. 

 VESTIGIAL PARTS (continued] ... ... ... 79 



CHAPTER V. 

 DICHOTOMY 102 



CHAPTER VI. 

 ATAVISM OR REVERSION ... ... ... , M 134 



