[27] 



o. 



HELICEA. ^- Sd^ggSol" 



3 a -s i cT I .5- f^ 'S 5 



Pelia, Alb ** 



spirulata, Pfr. 

 Ophiogyra, Beck , * 



polygyrata^ Born. 

 Polygyra, Say , ** ***** 



auricitlata, Say. 

 Stenotrema, Raf. ** * 



spinosa, Lea. 

 Triodopsis, Raf ** * * * 



palUata^ Say. 

 Mesodon, Raf. ** * 



albolabris, Say. 

 Acanthinula, Beck * 



harpa, Say. 

 Vallonia, Risso * 



pulchella, Mull. 

 Fruticicola, Held * 



Mspida^ L. 

 Aglaia, Alb * * * 



Ghieshregliti, Nyst. 

 Eurycampta * * * 



Bonplandi, Lam. 

 Arionta, Leach , * '^'^ * 



Townsendiana, Lea. 

 Euparypha, Hartm * 



areolata, Sowb, 

 Coryda, Alb ** * 



alauda, Fer. 

 Pomatia, (Leach,) Beck * * 



Humioldtiana, Yal. 

 Thelidomus, Swain ** * * v 



auricoma^ Fer. 

 Cysticopsis, Morch. * ** 



tenerrima^ C. B. Ad. 

 Plagioptycha, Pfr * * ** * 



loxodon, Pfr. 

 Polymita, Beck * ** 



muscarum, Lea. 

 Liochila, Alb * * 



Jamaicensis^ Chem. 

 Eurycratera, Beck ** * 



Bominicensis, Pfr. 

 Polydontes, Montf. ** * 



imperator, Montf. 



