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 ....... 



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

 breathe, 9, 10; Operculum, 12; Gills, 18. 



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; Regions of Mussel, 29; How 

 they crawl, 30; Excurrent and Incurrent Orifices, 31; Siphons. Mantle. 82; How- 

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

 open and Ligament acts, 36. 



