267 



much more elegant in fliape, more contrafted in the aper-. 

 ture, and formed with a greater number of volutions. 



In fize it is nearly double that of the cojlatus, and is 

 readily diltinguiflied by its more flender form. 



^ **' 1 3. 



M. with a flender fliell, with nine or ten coflated volu- Gracilis. 

 tions, tapering to a fine point: the ribs are eleven or Tab. 15. f. 5. 

 twelve in number croffed with numerous flrice : thefe ribs 

 do not continue throughout the fliell, but are feparated at 

 the jundure of each fpire by a flat fpace, at which part 

 the tranfverfe fl;ri32 are uninterruptedly continued in a fpi- 

 ral direftion up the fliell, like fine threads; at the bafe of 

 the body whirl, which is deftitute of ribs, the tranfverfe 

 Itrias are ftronger and more diftant : the ribs are very con- 

 vex or arched, giving the volutions a tumid appearance: 

 aperture narrow; canal moderately long, afcending ; outer 

 lip a little fpread, margin arcuated; inner lip very flight'y 

 thickened. Length leven-eighths of an inch ; breadth 

 two-eighths. 



o 



This new, and elegant fpecies, was picked up on the 

 fands of Biddeford bay in Devonfiire, and is the only one 

 we could procure : the colour is yellowifli, inclining to 

 pale ferruginous in the futures, or divifions of the fpires. 



14. 

 Murex acuminatus. Br. Zool. t. 79? inner quadrangle lower Nebula. 



right hand. Tab. 15. f. 6. 



Turt. Lin. iv. p. 446. 



M m 2 M, with 



