uiiocorTis. 177 



Dominicensis, Pfeiff. pallida, Gould. 



filicosta, Shuttl. reticosta, Pfeiff. 



gracilicollis, Ferus. Robertsi, C.'B. Adams. 



Grayana, C. B. Adams. seminuda, C. P>. Adams. 



Hanleyana, Pfeiff. simplex, C. B. Adams. 



humilis, C.B. Adams. subula, Ferns. 

 inornata, C. B. Adams. 



Sub-gen. strophina, Morch. 



Shell cylindrically-turreted, sub-ventricose, umbilicated, apex 

 truncated; whorls convex, obliquely and symmetrically plicated; 

 columella angulated at the base, sub-arcuated; aperture simple, 

 sub-quadrate. 



Laterradii, Gratel. 



Sub-gen, apoma, Beck (Casta, Albers). 



Shell sinistrorsal, truncate, cylindrically subulate; whorls 

 united by an oblique suture, the last very shortly free, carinated 

 at the base ; aperture oblong, circular, peristome expanded. 



Agnesiana, C. B. Adams. gracilis, Wood. 



elongata, Chem. 



Sub-gen. acera, Albers. 



Shell rimate, cylindrical or sub-fusiform, apex conical, not 

 truncate ; last whorl shortly or not at all produced, carinated at 

 the base ; columella plicate ; aperture oblong-rotundate, peri- 

 stome continuous, free, expanded. 



cinerea, Pfeiff. Pilocerei, Pfeiff. 



Goldfussi, Mice. Tiiisei, Pfeiff. 



Morini, Morel. Koemeri, Pfeiff. 



Pfeifferi, Mke. scalarina, Shuttl. 



Philippiana, Pfeiff. teres, Mke. 



