326 



well defined line : aperture fub-orbicular; outer lip ar- 

 cuated: a faint dupiicature on tlie pillar lip deftitute of 

 any tootli, but a {maW umbilicus is formed by its reflexi- 

 on. Length more than one eighth of an inch ; breadth 

 fcarcc one third of its length. 



From Salcomb bay, fand, very rare. 



39. "** 



Nivosus. T. with a fmooth, glofTy, white fliell, rather {lender, 



and tapering to an obtufe point : volutions five or fix, 

 much rounded, and deeply divided by the feparaling 

 line: aperture fub-oval ; inn-er lip, and Columella quite 

 fmooth and even: no umbilicus. Length nearly one 

 line; breadth fcarce one third its length. 



This fpecies has fomewhat the (hape of Turbo inter- 

 JiinElus, but is deUitute of tbe tooth, as well as the ribs. 



/ 

 Found in fand on the fouth coafl; oi Devon, very rare. 



40. 

 Semicostatus. T. with a fhort, conic, white fliell, obtufely pointed: 

 volutions four or five, rounded, well defined by the fe- 

 parating line, and wrought with faint ribs, and fine ob- 

 folete transverfe flrice on- the body whirl, both of which 

 are inconfpicuous on the fuperior fpires • the ribs do not 

 extend to the lower part even of the body, where the 

 fnw-nl tranverfe ftri?e become moftconfpicuous: aperture 



fub- 



