VERTIGO. 171 



Sub-gen. ennea, II. and A. Adams. 



Shell slightly rimate, sub-cylindrical, apex obtuse, smooth, 

 shining, hyaline ; whorls flattened, the last narrow, sulcated 

 externally in the mid-die, lamellate within, with a strong plait 

 parallel to the columella; aperture sub-circular; parietal lamella 

 extending inwards and situated close to the right margin ; peri- 

 stome expanded, the right margin flexuous, thickened in the 

 middle. 



bicolor, Hutt. elegantula, Pfeiff. 



Ceylanica, Pfeif. Pirrei, Pfeiff. 



crystallum, Morel. 



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



Shell sinistral, rimate, ovately-conical, smooth ; spire sub- 

 cylindrical or conic, whorls flattened, the last ascending, com- 

 pressed at the base ; aperture semi-oval, plicate ; peristome 

 simple, nearly straight. 



Capensis, Kurr. Muhlfeldti, K'ust. 



Kurri, Erauss. Pottebergensis, Krauss. 



Genus VERTIGO, Miiller. 



Shell deeply rimate, ovate, apex attenuated, obtuse; 

 whorls 5 G ; aperture semi-oval, 4 7 plicated ; peristome 

 slightly expanded, white-lipped. 



Syn. Pupella, Swains. 



Ex. V. antivertigo, Draparnaud, pi. 76, fig. 4. Shell, 

 V. pusilla, Miiller, fig. 4, a. 



The species of this genus are all of a small size, often 

 hyaline, reversed, and of a brown colour. They are chiefly 

 European in their geographical distribution, and live on the 

 bark of trees and among moss in banks. The tentacles in 

 this genius are rudimentary or wanting. 



