156 Notes on certain Terrestrial Mollusca. 



Under these circumstances, I propose to remodel the descrip- 

 tions of the Family Proserpinacea and Genera hitherto com- 

 prised in it, and to place the Mexican shell above referred to, 

 under the specific name Berendti, in the new genus Proserpi- 

 nella. 



Fam. PROSERPINACEA. 



T. imperforata, helicinaeformis, basi modo vel etiam superne 

 callo nitido obducta ; sepimenta interna ad modum Helicinace- 

 orum sensim et regnlariter resorpta. Operculum nullum. 



I. Ceres Gray. 



p T. carinata, superne rugosa, epidermide tenui obdacta, basi callo 

 nitido rnunita ; columella unidentata ; utrinque lamellifera ; perist. rec- 

 tum, subincrassatum. 



1. C. eolina Duclos. 2. C. Salleana Cuming. 



II. Proserpina Gray. 



T. globosa vel depressa, laevigata, utrinque plus minusve callo nitido 

 obducta ; columella unidentata ; paries aperturalis lamina nulla, vel 1, 

 vel pluribus spiralibus munitus ; apertura lunaris, ssepe laminis palatali- 

 bus coarctata ; perist. simplex, rectum. 



A. Lamellis parietalibus et palatalibus instructce. 

 Globosa. Depressa. 



P. Vinguifera Jonas. P. nitida Gray. 



B. Lamellis parietalibus solummodo instructs. 



Globosa. Depressa. 



P. pisum C. B. Ad. P. depressa Orb. 



P. globulosa Orb, P. bidentata C. B. Ad. 



C. Lamellis parietalibus et palatalibus carentes. 



Depressa. 

 P. Swifti Bland. 



