264 HELIX. 



ture oblique, irregularly ovate, inclined to be contracted, peristome 

 simple, margins converging, columellar margin almost covering the 



umbilicus. Diam. 8 mill. 



Tasmania. 



H. (CAM.EXA) MEDIANUS, Cox. PI. 37, figs. 46, 47. 



Perforate, thin, transparent, reddish brown, with rather fine 

 growth-lines; whorls 5J, the last conspicuously keeled and inflated, 

 base excavated around the umbilicus. Diarn. 10 mill. 



Tasmania. 



H. AUSTRINUS, Cox. PL 37, figs. 56, 57. 



NarroAvly umbilicated, light olive green, coarsely striated ; 

 whorls 5-2, the last much inflated, descending in front, base convex. 



Diam. 9 mill. 



Tasmania. 



H. OCCULTUS, Cox. PL 37, figs. 50, 51. 



Kather widely umbilicated, smooth, thin, shining, horn color; 

 whorls 4, gradually increasing, rounded, laterally flattened, suture 

 excavated, last whorl not descending in front. 



Diam. 2'5 inch. 



Tasmania. 



H. (VIDENA) RUGA, Cox. PL 37, figs. 93-95. 



Widely, perspectively umbilicated, rather thin, yellowish corneous 

 or dark olive, shining below ; whorls 4?, rapidly increasing, with 

 coarse rib-like striae above, smooth below, last whorl much dilated 

 and slightly depressed in front. Diam. 9 mill. 



Tasmania. 



Closely related to H. bombydna and H. Sinclairi, but smaller, 

 rounder, and destitute of band. 



H. (RHYSSOTA) HALLI, Cox. PL 37, figs. 54, 55. 



Narrowly umbilicated, thin, very finely striated, pale yellowish 

 brown ; whorls 4 -5, regularly increasing, rounded, with deep 

 suture. Diam. 1*5 mill. 



Tasmania. 



H. (RHYSSOTA) TRAJECTURA, Cox. PL 37, figs. 68, 69. 



Narrowly umbilicated, thin, transparent, not shining, pale brown, 

 with irregular coarse growth -striae ; whorls 5j, the last dispropor- 

 tionally large and subcarinated ; columellar lip widely dilated 

 and reflected, half covering the umbilicus. 



Diam. 8 mill. 



Tasmania. 



