263 



rounded, but rife perpendicular above each other, the top 

 of each being almofl flat; the ribs at that part angulated, 

 or turrited, and fuddenly dechne to the feparating line; 

 aperture narrow-oblong, ending in a broad canal ; outer 

 lip a little thickened by a rib ; upper part angulated ; pillar 

 lip fmooth. Length three-quarters of an inch ; breadth 

 rather more than a quarter. 



We are indebted to Mr. Boys for ourfirft acquaintance 

 with this fpecies, who informs us, it is not uncommon on 

 the fhore of Sandwich in Kent. 



Have fince found it at Bicldeford bay, in DevonJJiire, 

 and on the fouth coaft of Wales, particularly about Tenby 

 and Laugharne. 



9. 

 M. with fix taper ribbed fpires, of a pale rufous-brown Rufus. 

 colour, and fometimes chefnut: the volutions are gene- 

 rally furnifhed with fifteen or fixteen fmall ribs, flriated 

 tranfverfely : aperture narrow, oblong, ending in a fhort 

 canal ; outer lip fmooth, rarely thickened by a rib ; pillar 

 lip fmooth. Length three-tenths of an inch ; breadth one 

 eighth. 



This fpecies is found with the lafl at Sandxjoich, Bidde- 

 ford bay, and on thecoafl; o^ Wales: we have alfo taken 

 it on the fouth coaft of Devon, and in DorfetJJiire, where 

 the other has never occurred. It has indeed, fomewhat 



the 



