CONTENTS. 



.CHAPTER I. 



PAGE 



COLLECTING AND PRESERVING SNAILS, MUSSELS, AND SLUGS 9 



CHAPTER II. 

 THE ANATOMY AND PHYSIOLOGY OF A SNAIL > . .14 



CHAPTER III. 

 THE ANATOMY AND PHYSIOLOGY OF A FRESH-WATER MUSSEL 45 



CHAPTER IV. 



THE CLASSES, ORDERS, FAMILIES, GENERA, SPECIES, AND 



VARIETIES OF BRITISH LAND AND FRESH-WATER SHELLS 59 



CHAPTER V. 



THE DISTRIBUTION OF THE BRITISH LAND AND FRESH-WATER 



MOLLUSCA (j. W. TAYLOR AND W. DENISON ROEBUCK) , 94 



