280 MUREX. ROCK-SHELL. Class VL 



From the Portland cabinet. Tab. Ixxx. 

 and Frontispiece. 



3. GRACILIS, Lin. Tr. viii. 143. Mo?7f. Test. Br. 267. t. 15. 



/. 5. id. 586. 



* M. with a tapering shell; volutions ribbed and 

 striated in a decussated manner ; sutures plane; 

 length seven eighths of an inch; breadth two 

 eighths. 



Discovered by Mr. Mojitagu on the sands of 

 Biddeford bay. 



4.. ATTENU= Lin. Tr. viii. 143. Mont. Test. Br. 266. t. Q. 



* M. with a slender tapering shell; the volutions 

 scarcely prominent, Avith nine equi-distant con- 

 spicuous ribs ; length half an inch ; breadth 

 one eighth of an inch. 



Discovered by Mr. Montagu in sand from 

 Falmouth harbour and at Biddeford. 



5. NEBULA. Lin. Tr. viii. 143- Mont. Test. Br. 267. t. 15. 



various- f Q 



colored. 



* M. with a tapering shell, and eight ribbed vo- 

 lutions, most delicately reticulated; tailobhque; 

 length half an inch ; inhabits the sea. Tab. 

 Ixxxii. Jig. 7- 



Devonshire and south TFales coasts. 



ATUS. 



