CONTENTS. 



CHAPTER I. 



PAGE 



FRESH-WATER SHELLS ... 1 



Where to collect, 1 ; Empty or Dead Shells, 2 ; Parts of a Shell named, 3 ; Forms of 

 Spire, Dextral, and Sinistral Shells, 4 ; Lines of Growth, Growth of a Shell, 5, 6. 



CHAPTER II. 



FRESH-WATER SNAILS .... V 



Where and how to collect, 7. 8 ; Live Shells, 8 ; Head, Tentacles, Foot, how they 

 breathe, 9, 10; Operculum, 12; Gills, 13. 



CHAPTER III. 

 LAND SNAILS . ... . . 14 



Where to collect, 14 ; Parts of the Animal, 15, 16; Tentacles, Jaw, 17; Explanation 

 about an Object being enlarged, 18 ; Slug, 19 ; Eggs and Young, 20 ; Mantle, 21. 



CHAPTER IV. 



SEA SNAILS . . . . . . . . .21 



Where to collect, 22; Entire Aperture, Aperture Notched or Canaliculated, 23; Si- 

 phon, and its Uses, 24 ; Flesh and Animal Feeders, 25 ; Egg-cases or Capsules, 

 26, 27. 



CHAPTER V. 



FRESH-WATER MUSSELS . . .... 27 



Where found, 27 ; Ligament, Lines of Growth, 28 ; Eegions of Mussel, 29 ; How 

 they crawl, 30 ; Excurrent and Incurrent Orifices, 31 ; Siphons, Mantle, 32 ; How 

 Pearls are formed, 33; Internal Markings of Shell, Hinge, 34 ; How the Shells 

 open and Ligament acts, 36. 



