CONTENTS. 
———9 —_——_ 
PAGE 
INTRODUCTION. Ae Paap iath Soe ss I 
CHAPTER I. 
THE ENLARGEMENT OF PARTS. FROM INCREASED USE, 
OVERGROWTH AND IRRITATION (5 0% ve ai 
CHAPTER II. 
DISUSE AND ITS EFFECTS... ay Pee atk 35 
CHAPTER III. 
VESTIGIAL PARTS ie ae = ee 5 SOO 
CHAPTER IV. 
VESTIGIAL PARTS (continued) ia Sr ee 79 
CHAPTER V. 
DICHOTOMY ec noe eee ane AG ioe Oe 
CHAPTER VI. 
ATAVISM OR REVERSION eee 134 
