350 MOLLUSCA. UURICIDM. Fusus. 



336. F. septangularis. — Whorls seven, strong, with seven 



continuous obtuse longitudinal ridges, the intervening spaces 



broad, shallow, and smooth. 



Murex sept. Mont. Test. Brit. 268. t. ix. f. 5. Don. Brit. Shells, 

 t. clxxix. f. 4. — In deep water, rare. 



Length |ths of an inch, breadth ftlis ; glossy purplish-brown ; whorls ta- 

 pering, nearly even, the ridges scarcely interrupted by the separating line ; 

 aperture oblong-oval, ending in a short canal, outer lip sharp at the edge. 



337. F. attenuatus. — Whorls eight, smooth, nearly flat, with 

 nine strong equidistant ribs. 



Murex att. Mont. Test. Brit. 260. Tiirt. Conch, Diet. 91.— English 



and Irish coasts, rare. 



Length | an inch, breadth about |th; yellowish-white; slender, tapering 



to a line point ; ribs undulated as they rise in the middle of each volution ; 



aperture narrow, contracting a little at the canal, outer lip thickened at the 



back. 



338. F. nebula. — Whorls eight, strongly ribbed longitudi- 

 nally, finely striated transversely ; canal shghtly bent to the left. 



Murex neb. Mont. fest. Brit. 26?. t. xv. f. 6 — In sandy bays, not un- 

 common. 



Length about half an inch, breadth j%ths ; yellowish-white or rufous ; ribs 

 nearly continuous across the thread-like separating line ; aperture narrow 

 oblong-ovate, outer lip sharp. 



339. F. riifus. — Whorls six, longitudinal ; ribs sixteen, spi- 

 rally striated ; canal short and straight. 



Murex rufus, Mont. Test. Brit. 203 — In deep water, rai-e. 

 Length /gths of an inch, breadth ith; colour brown; whorls slightly 

 rounded ; aperture ovate, outer lip thin, inner lip broad and smooth. 



340. F. minimus. — Whorls five, longitudinal; ribs ten, strong- 

 ly striated spirally ; canal short, outer lip striated internally. 



Buccinum minimum, Mont. Test. Brit. 247. t. viii. f 2.— B. brunneum, 

 Don. Brit. Shells, t. clxxix. f 2. — In deep water, rare. 

 Length j-gths of an inch, breadth about ,'gth ; brown ; whorls slightly 

 rounded ; aperture oval ; canal straight, and very short. 



341. F. linearis. — Whorls seven, strong ribbed, with elevat- 

 ed spiral striae ; outer lip crenated internally. 



Murex lin. Mont. Test. Brit. 201. t. ix. f. 4 M. elegans, Don. Brit. 



Shells, t. clxxix. f. 3 — In sandy bays, rare- 

 Length |ths, breadth Jth ; brown, streaked with purple; whorls rugose, 

 rounded ; apex pointed ; ribs about ten in number ; aperture oval, terminat- 

 ing in a straight canal ; outer lip thickened externally. 



342. F. accinctus. — Whorls seven, ribs bent in the middle, 



finely striated spirally. 



IMurex ace. Mont. Test. Brit. Sup. 114. Laskey. Wern. Mem. i. 402. 

 t. viii. 14 In deep water in the Frith of Forth, where only one spe- 

 cimen occuired to INIr Laskfev. 



