﻿CONTENTS, 



CHAPTER I. 



PAGE 



Fresh-water Shells .....>• 1 



Whero 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 ot a Shell, 5, 6. 



CHAPTER IL 



Fresh-water Snails . . . • • • • *? 



Where and how to collect, 7. 8 ; Lire 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, 28; 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 32; How 

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

 open and Ligament acts, 3C. 



