1 TABLE OF FAMILIES AND GEKEEA. 



Page 



Order PISTH OBE AN CHI AT A 259 



FamUy ACT^ONID^ 259 



Actaeon 259 



Solidula 261 



Crenilabrum 261 



Family EINGICULID^ 262 



Eingicula 262 



Family SCAPHANDEID^ 263 



Scaphander 263 



Family PHILINID^ 264 



PhUine 264 



Family BULLION 264 



Bulla 264 



BuUinella 265 



Acera 267 



Atys 267 



Family TOENATINID^ 268 



VolvuleUa 268 



FamUy UMBEELLID^ 269 



Umbrella 269 



Order PO LYPL AGO PH E A 269 



Family CHITONID^ 269 



Chiton 269 



Order PULMONATA 269 



Family HELICID^ 269 



Helix 269 



