TABLE 



FAMILIES, GENEEA, AND SUBGENERA. 



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Class GASTEROPODA. 

 Order Puliionata. 



Family Helicid^e: page 



Helix 1 



Liparus ........ 2 



Family Bdlimulid^ : 



Placostylus ....... 4 



Family Limn^id.e : 



Limnrea . 4 



Family Amphibolid.e : 



Amphibola 5 



Oi'der Opisthobranchiata. 

 Family Act^onid^e : 



Actseon 7 



Solidula 8 



Tornatellsea ....... 9 



Triploca 9 



Adelactreon 10 



Family Scaphandrid^. : 



Scaphander 12 



Family Bullid^e : 



Bulla 13 



Bullinella 13 



Family RixGiccLiDiE : 



Ringicula 15 



b 



