61 



lengthened ; no fissure in the right lip. Columella smooth. 

 Operculum horny. 

 F. CORNEUS. xMurex C. Turt. Lin. Pen. Brit. Zo., 

 vol 4, pi. 76, fig. 99. Mont. Test. Brit., vol. 1, p. 258. 

 F. C. Flem. Brit. An., p. 348. I have only met with one 

 specimen, which was taken in a trawl at Falmouth. 



* F. DESPECTUS. Flem.Brit. An., p. 349. Not common. 



* F. PURPUREUS. Murex P. Mont. Test. Brit., vol. 1, 

 p, 260, pi. 9, fig. 3. F. P. Flem. Brit.. An,, p. 350. 

 Scarce. In shell sand on the south east coast. 



F. LINEARIS. Murex L. Mont. Test. Brit., vol. 1, 

 p. 261, pi. 9, fig. 4. F. L. Flem Brit. An., p. 350. 

 Scarce, in shell sand. 



* F. MURICATUS. Murex M. Mont. Test. Brit., vol. 1, 

 p. 262, pi. 9, fig. 2. F. M. Flem. Brit. An., p. 351. 

 Scarce, in shell sand on the south east coast, and near the 

 Laud's-end. 



F. COSTATUS. Murex C. Mont. Test. Brit., vol. 1, 

 p. 265. F. C. Flem. Brit, An., p. 349, Rare, in shell 

 sand. 



F. ATTENUATUS. Murex A. Mont. Test. Brit., vol. 1, 



p. 266, pi. 9, fig. 6, F. A. Flem. Brit. An., p. 350. 



Rare, in shell sand. 

 F. NEBULA. Murex Acuminatus. Pen. Brit. Zo., vol. 4, 



pi. 79. M. N. Mont. Test. Brit., vol. L, p. 367. F. N. 



Flem. Brit. An., p, 360. Found at Falmouth by Montagu. 



* F. SEPTANGULARIS. Murex S. Mont. Test. Brit., 

 vol. 1, p. 268, pi. 9, fig. 5. F. S. Flem. Brit. An., 

 p. 350, In shell sand, from the Land's-end along^the 

 south coast, not uncommon. 



TRITON. 



GENERIC CHARACTER: The shell oval or oblong, 

 channelled at the base ; the prominences either alternate 

 or rare, or nearly solitary, and never forming a longi- 

 tudinal row ; aperture oblong. An operculum. 

 Sometimes the Triton has only one prominence, on the 



right lip, which is never wanting. These prominences are 



never spinous. 



* T. ERINACEUS. Murex E. Turt. Lin. Fen. Brit. Zo., 

 vol, 4, pi. 76, fig. 95. Stew, Elem., vol. 2, p. 403. T. E. 

 Flem. Brit. An., p. 356. Common, though scarcely abun- 

 dant. Young shells difter in having the outer lip com- 

 paratively thin, and the pillar narrow. 



ALATA. 



The shell with a more 'or less lengthened canal at the 

 bottom of the aperture, the right lip of which changes its 

 form with age, and has a sinus at the lower part. 



