219 



white with rufous spiral lines in the middle of each 

 whorl ; whorls six or seven, nearly even, strongly 

 striated transversely at the base, finely and closely ribbed 

 longitudinally and obsoletely striated in the interstices 

 spirally ; apex sharp ; aperture narrow and oval ; outer 

 lip thickened with a broad external rib and denticulated 

 within, at its base near the end is a small rufous spot 

 and another at the upper angle of the aperture, from 

 these two obsolete broken lines gird the base of the 

 shell, i Weymouth, very rare. 



B. TUBERCULATTJM. Turt. D. p. 16. NASSA T. 

 F.p. 341. Taper, white, but not glossy; whorls six, 

 rounded and well defined, sculptured by numerous 

 strong longitudinal ribs which are crossed by transverse 

 lines, thus seeming tuberculated ; aperture oval, the 

 outer lip thin and toothed within ; the inner lip strongly 

 marked with oblique striae and ending in a short, re- 

 flected, rather cloven canal. 0,60. ..0,16. In sand, 

 Exmouth. 



TRIBE. COLUMELLARIA. 

 No canal at the base of the aperture, but a subdorsal 



* Whether to consider the Voluta Hjalina of Mon- 

 tague as a Mitra or as a Buccinum I know not, having 



