Notes on certain Terrestrial Mollusca. 157 



III. Prosekpinella, nov. gen. 



T. depressa, lsevigata, utrinque callo nitido obducta ; paries 

 aperturalis lamina 1 munitus; apertura lunaris; perist. sim- 

 plex, rectum. 



Proserpinella Berendti, nov. sp. 



T. depressa, tenuis, nitida, albida; spira brevissime elevata; sutura 

 vix impressa, submarginata ; anfr. 4, sensim accres- 

 FlG - 2 - centes, ultimus latior, convexiusculus, basi convexior, 



juxta columellam excavatus ; apertura parum obliqua, 

 lunaris, unidentata, dente lamelliformi vix prominente 

 intrante in pariete aperturali ; perist. simplex, rec- 

 tum. 



Shell depressed, thin, sinning, white ; spire 

 very little elevated ; suture scarcely impressed, 

 sub margin ate ; whorls 4, gradually increasing, 



Proserpinella Berendti , , . , , 



Bland. the last broader, rather convex, more convex 



at the base, excavated near the columella ; 

 aperture oblique, lunate, with 1 little elevated lamelliform tooth 

 on the parietal wall ; perist. simple, straight. 

 Diam. maj. 2-3; min. 2£; alt. 1£ mill. 



Habitat. — Mirador, Atlantic slope, 3000 to 4000 feet eleva- 

 tion, Mexico. Dr. Berendt ! 



Remarks. — This species is most nearly allied in form to Pro- 

 serpina depressa Orb., or a small example of P. nitida Sowb., 

 but it is readily distinguished from them by its slightly deve- 

 loped parietal lamina and the absence of the columellar fold. 



Stenopus ? Guildingi, nov. sp. 



T. perforata, depressa, tenuis, subtilissime striatula, nitida, diaphana, 

 corneo-succinea ; spira planiuscula ; anfr. 4 celeriter accrescentes, vix 



