CONTENTS. 



CHAPTER I. 



PAGE 



Fresh-water Shells— Anomalies in Local Distribu- 

 tion 



CHAPTER II. 

 Means of Dispersal 27 



CHAPTER III. 

 Transplantation of Bivalves 56 



CHAPTER IV. 

 Transplantation of Univalves 85 



CHAPTER V. 

 Land Shells : their Tenacity of Life ... 90 



CHAPTER VI. 

 Means of Dispersal 115 



CHAPTER VII. 

 Dispersal of Slugs 167 



