Vill CONTENTS. 
II. DESCRIPTION OF THE SPECIES . : 
FAMILY PALUDINIDZ (MARSH SNAILS) 
>»  NERITIDE . ; 
5 LITTORINIDZ : : 
CHAPTER IV. 
AIR-BREATHING SNAILS. 5 
FAMILY LIMACID (SLUGS) . 
»  ONCIDIADA _. ; 
»  HELICIDA (LAND SNAILS) 
»  AURICULIDE . : 
»  LIMNZIDH (WATER SNAILS) 
OPERCULATED LAND SNAILS 
PAGE 
53 
53 
60 
62 
65 
66 
89 
92 
Lay 
18] 
220 
