156 yotes on certain Terre^strial MoUusca. 



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. 



Fa^l PEOSERPrS"ACEA. 



T. imperforata, helicinaeformis, b^i modo vel etiam snperne 

 callo nitido obducta ; sepimenta interna ad modum Helicinace- 

 ornm sensira et regnlariter resorpta. Operculum nullum. 



I. Ceres Gray. 



T. carinata, snperne rngosa, epidermide tenui obducta, basi callo 

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

 tum, subincrassatona. 



1. C. eoUna Duclos. 2. C. Salleana Cuming. 



n. 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 ; aportura lunaris, saepe laminis palatali- 

 bus coarctata ; perist. simplex, rectum. 



A. LamelUs parietalihus et palatalihus instmctcB. 

 Globosa. Depressa. 



P. Unguifera Jonas. P. nitida Gray. 



B, IximelUs jxirietalibus solummodo instrtictce, 



Globosa. Depressa. 



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



P.glohulosa Orb. P. bidentata C. B. Ad. 



C. LarneUis pariefalibus et palatalibus carentes. 



Depressa. 

 P. Swifti Bland. 



