RICINULA. PURPURA. 103 



very short; mouth violet, toothed on both sides. 

 H. W. 26. 47. 



R. ARACHNOiDES. Obovate, yellowish white, 

 muricated by black subulate unequal spines, 

 which are longer as they near the lip ; mouth 

 white, grinning; spire very short. 1. E. 395.3. 



R. MORus. Ovate, girded by several rows of 

 bluntish black nodules, with the interstices white ; 

 spire rather obtuse ; mouth violet, narrowed by 

 stout teeth, f . E. 395. 6. 



PURPURA. 



Shell oval, sometimes smooth, sometimes tuberculous 

 or angular; aperture dilated, terminating in- 

 feriorly in an oblique sub-channelled emargina- 

 tion ; columella flattened, terminating at base 

 in a point, 



P. PATULA. Ovate, transversely furrowed, 

 with six or seven rows of sharp tuberculations on 

 the body- whorl; reddish black, with sometimes 

 two broad paler bands towards the base ; spire 

 rather shoft ; aperture dilated ; pillar oblique, 

 reddish fulvous, and falcated; lip bluish white. 

 2f . W. 22. 53. 



P. HEMASTOMA. Ovate-conic,thickish, trans- 

 versely striated, cinereous, varying to greyish 

 brown, noduliferous, obtusely angular above; 



