586 

 xMUREX. 



Gracilis. ^^ the time we defcribed this fliell, one fpecimen only 



p. 267. had occurred, and that fomeudiat worn. We have now 



the fati>fat-iion to fay that, Mr, Bryer has fince fiivor- 

 ed us wiih a live fpecimen, taken with two or three 

 others, by dredging in the weft bay oi^ Portland. This is 

 larger, exceedmg an inch in length, with thirteen ribs : 

 the whole fliell of a yellowifh brown, except between 

 tliejun6lion of the fpires, which is purplifli-brown, and 

 a white band round the middle of the body whirl, be- 

 ginning at the upper angle of the aperture, and termi- 

 nating about the middle of the outer lip ; the fame mark 

 appears in the other, but almoft obfolete : tlie exterior 

 lip is (harp at the edge, thickened at the back by a rib^, 

 and fub-crenated within. This extremely rare Murex, 

 is one of the inoft; beautiful of the Britijh fpecies. 



TROCHUS. 



-pjrNUis. Trochus papillofus. Don. Br. Shells, iv. t. 127. 



TURBO. 



JuGQsus. ■ T. withafub-oval, ventricofe fiiell, with four fpirally 



ridged volutions; the firfl very large, occupying three- 

 fourth 



