OP CONCHOLOGY. 355 



HELICEA. jj So^gS2 -o^ 



r ^ — _h ad « ■£ 25 r o -M 



■S°Ka2a-=«°»3 

 oa fe-'ii § a 8 ,2 „• » o 

 H p£3 O t> "-> W P* O oo 



Pelia, Alb 



spirulata, Pfr. 

 Ophiogyra, Beck 



polygyrata, Born. 

 Polygyra, Say ** 



auriculata, Say. 

 Stenotrema, Raf. ** * 



spinosa, Lea. 

 Triodopsis, Raf ** * 



palliata, Say. 

 Mesodon, Raf. ** * 



albolabris, Say. 

 Acanthinula, Beck * 



harpa, Say. 

 Vallonia, Risso * 



pulchella, Mull. 

 Fruticicola, Held * 



hispida, L. 

 Aglaia, Alb * 



GMesbreghti, Nyst. 

 Eurycampta 



Bonplandi, Lam. 

 Arionta, Leach * ** 



Townsendiana, Lea. 

 Euparypha, Hartm * 



areolata, Sowb. 

 Coryda, Alb 



alauda, Fer. 

 Pomatia, (Leach,) Beck * 



Hurnboldtiana, Val. 

 Thelidomus, Swain - 



auricoma, Fer. 

 Cysticopsis, Morch 



tenerrima, C. B. Ad. 

 Plagioptycha, Pfr 



loxodon, Pfr. 

 Polymita, Beck * 



muscarum, Lea. 

 Liochila, Alb 



Jaraaicensis, Chem. 

 Eurycratera, Beck 



Dominicensis, Pfr. 

 Polydontes, Montf. 



imperator, Montf. 



