205 



F, ACCINCTUS. F.p. 350. MUREX A. Mont. Sup, 

 p: \\.Laskey Wern. Mem. \. p. 402. t. 8. / 14. 

 Yellowish white with an obsolete brown band (con- 

 sisting of four colored lines) on the middle of the body 

 whorl continuing to the apex ; whorls seven, finely 

 striated spirally, adorned with longitudinal ribs which 

 are highest and bent in the middle ; aperture oblong, 

 canal short. i...0,08< Frith of Forth, rare. 



F. GYRINUS. F.p. 351. MDREX G. Mont. Sup. 

 p. 170. Lackey Wern. Mem. p. 401. t. 8. /. 10. 

 Brown, strong, short, conic, and tumid ; whorls four, 

 with numerous spiral rows of brown tubercles (eight on 

 the body whorl three on the succeeding.) i....J. 

 Frith of Forth. 



F. PURPUREUS. F t p. 351. MUREX P. Mont. p. 

 260. t. 9. /. 3. Lin. T. 8.^. 148. D.p. 745. 

 Fusiform, dark purple with sometimes a few spots or 

 blotches of white ; whorls nine or ten, rounded and 

 tapering to an extremely fine point, furnished with 

 nineteen or twenty slightly oblique ribs decussated 

 by numerous sharp elevated ridges which render the 

 shell extremely rough and almost cancellated ; aper- 

 ture narrow, oval, terminating in a straight canal ; 

 outer lip thin, margin white and crenated by the stride; 



