Fusus. MOLLUSCA. MUBICID.E. 351 



Length 4 lines, breadth 1 line ; yellowish-white, with an obsolete brown 

 band (consisting of four coloured lines) on the middle of the body-whorl, con- 

 tinuing to the apex ; the ribs are highest at the middle of the whorl ; aper- 

 ture oblong ; canal short. — This species is frequently to be met with among 

 West Indian shells. 



343. F. gyrinus. — Whorls four, with numerous spiral rows 

 of brown tubercles. 



Murex gyr. Mont. Test. Brit. Sup. 170. Laskey, Wern. Mem. 401. 



t. viii. f. 10 Frith of Forth, Mr Laskey. 



Length fths, breadth |th of an inch; brown; strong, short, conic, and tu- 

 mid ; eight rows of tubercles on the body-whorl, and three on the preceding 

 one. 



344. F. purpureas. — Whorls ten, tapering; ribs twenty, 

 oblique, with sharp spiral ridges. 



Mm-ex purp. Mont. Test. Brit. 260. t. ix. f. 3 — In deep bays, rare. 



Length fths of an inch, breadth §ths ; purple ; apex pointed ; the spiral 

 ridges are numerous, rising into angles on the ribs, giving the shell a very 

 rough appearance ; aperture narrow, oval, terminating in a strait canal ; out- 

 er lip thin ; pillar obliquely striated, and somewhat tuberculated. 



345. F. muricatus. — Whorls seven, tapering, ribs numerous, 

 crossed by strong raised spiral striae ; canal slender, long. 



Murex mur. Mont. Test. Brit. 262. t. ix. f. 2 — In deep water, rare. 



Length }, an inch, breadth \ ; epidermis red, shell white or flesh coloured; 

 aperture oval, outer lip sharp, crenulated within ; pillar smooth. 



346. F. chordula. — Whorls five, with fifteen wire-like ribs, 

 continuous, and bending in the middle towards the outer lip ; 

 spirally striated. 



Murex chordula, Tart. Conch. Diet. 94.— In drifted sand, Dublin Bay. 



Length 2 lines, breadth |ds less ; brown ; conic ; a little tapering to a ra- 

 ther obtuse point ; whorls rounded, the first occupying more than half the 

 length ; aperture narrow, oval, ending in a short canal ; outer Up thickened 

 by a rib on the back. 



347. F. Barvicensis. — " Shell ventricose, white, with longi- 

 tudinal furbelowed ribs, continued obliquely across a flattened 

 space at the sutures ; beak rather long, slightly ascending." 



Dr Johnston, Edin. Phil. Journ. vol. xiii. 221 — Sea coast, near Berwick. 

 " Shell white, half an inch long, and one-half as broad, with six whorls, di- 

 vided by a flattened space, and longitudinally ribbed. There are thirteen 

 ribs on the body-whorl, finely furbelowed-, projecting a little at the suture, 

 terminating on the beak, which is produced and smooth towards its extremi- 

 ty. The indented appearance of the ribs is produced by obsolete transverse 

 stria? crossing them. The ribs do not terminate at the sutures, but are con- 

 tinued across by elevated striae. Aperture round, inclining to oval, with 

 smooth lips. 



348. F. Bamjius. — Whorls six, aperture rounded, canal pro- 

 duced and bent. 



