2SS pupinin^e. 



Sub-gen. paxtllus, H. and A. Adams. 



Operculum ? 



Shell pupiform, rimate, smooth ; spire acuminated ; aperture 

 semi-ovate, ascending on the body-whorl ; inner lip adnate, 

 spreading, flexuous, with a prominent tooth-like fold in the mid- 

 dle ; outer lip double, emarginate anteriorly ; umbilical region 

 with a spiral elevated ridge ending in a notch at the fore part of 

 the aperture. 



ad versa, H. and A. Adams. 



Sub-gen. arinia, H. and A. Adams. 



Operculum thin, shelly, whorls few, with prominent lamellte 

 on their external edges. 



Shell sub-imperforate, thin, smooth, shining; spire ovate, 

 apex blunt, whorls inflated, the penultimate the broadest; aper- 

 ture nearly circular ; peristome shortly expanded, the margins 

 almost contiguous, columellar margin angularly dilated in the 

 middle. 



minus (Cyclostoma), Sow. 



Genus PUPINA, Vignard. 



Operculum thin, membranous, narrow-whorled, rather 

 flat. 



Shell pupiform, covered by a smooth, shining callus ; 

 peristome simple, thickened or reflexed, the columellar mar 

 gin with a transverse canal in the middle, and another canal 

 at the insertion of the right margin. 



Ex. P. bicanaliculata, Sowerbt/, pi. 8G, fig. 6. Oper- 

 culum, P. bicanaliculata, fig. 6, a, 6, b. 







