CONTENTS. 



INTRODUCTION. 



Internal Structure of the Mollusca Eespiration Loco- 

 motion Reproduction 



CHAPTER I. 



Number and Distribution of British Mollusca Classi- 

 fication Bivalves and Univalves Aquatic and 

 Terrestrial Univalves The Commoner Forms of 

 Shells ' . . . 9 



CHAPTER II. 



A Ramble over the London Clay Shells in London 

 Gardens Medicinal Properties of Snails The 

 Common Garden Snail a Musician Other Garden 

 Snails Snails in Hyde Park River-side Species 

 The Shell-slug 19 



CHAPTER III. 



The London Clay continued Shells in London Waters 

 Mussels The Pearl Mussel The Painter's Mus- 

 selThe Swan Mussel The Zebra Mussel Pond 

 and River Shells 34 



