OP CONCHOLOGT. 317 



2. Arionta Calif orniensis, Lea. 



Plate 5. figure 20. 



Subglobular, thin, transparent, sligMj granulated and 

 striate, shining; spire elevated; whorls 5, convex, the last 

 very broad; aperture rather small, subcircular, lip slightly 

 everted, thickened within, at the base more reflected, nearly 

 covering the small umbilicus. Pale yellowish horn-color, mi- 

 nutely flecked with pale spots, with a narrow brown, pale mar- 

 gined band above the periphery. 



Diam. 18, height 15 mill. 



California. 



3. Arionta Kelletti, Forbes. 



Plate 6, figure 1. 



Depressed-globose, thin, rugose-granulated; spire subtur- 

 binate, suture moderate ; whorls 6, a little convex, the last 

 large and well rounded at base; aperture wide-lunate, lip ex- 

 panded, partly covering the narrow umbilicus. Eeddish- 

 brown, with a darker band on the spire and a lighter one on 

 the periphery of the last whorl. 



Diam. 22, height 19 mill. 



San Diecro, Cal. 



4. Arionta crebristriata, Newcomb. 



Plate 6, figure 2. 



Moderately thick, depressed-globose; spire turbinate, suture 

 well impressed ; whorls 5, a little convex, the last descending 

 towards the aperture, with dense, strong, transverse and mi- 

 nute, longitudinal strise ; aperture rounded, lip either thin, 

 acute, or thickened within, its extremities approaching, some- 

 times connected by a callus; umbilicus partly covered by the 

 lip. Dark horn-color, obsoletely banded, livid within the 

 aperture. 



Diam. 23, height 14-20 mill. 



San Clemente I., Cal. 



Variable in elevation, and in the thickening of the lip. 

 Differs from Kelletti, Forbes, in sculpture. 



