236 DR Johnston's descriptive catalogxte of the 



to have any spiral striae, as they are merely vindulations of the ribs, which 

 nearly disappear in the hollows, and on the left side of the ribs, the latter 

 lying over in that direction. The striae of F. mnricatus are more distinct, 

 numerous, and regular, particularly toward the base of the shell. The 

 outer lip of F. muricatus is strongly tuberculated within : your Berwick 

 shell is smooth in the specimen sent, which however is young." I may 

 add, that I have now examined six specimens, in all of which the lips of 

 the aperture are smooth, and two of the specimens at least appeared to be 

 full-grown. 



5. F. Turricula, shell white, turreted with eight gradually decreasing 



whorls flattened at the sutures, crossed with many thickish 

 straight ribs, and spirally striated ; aperture oval, with a very 

 short wide canal. Length I'Vths ; breadth fgths. Flem. Br. 

 Anim. p. 349. Murex Turriciila, Mont. Test. Brit. 262. tab. 9. 

 fig. 1. 



Hah. Berwick Bay, very rare. 



There are fifteen ribs on the body-whorl, which disappear on the back of the 

 canal. The whorls are flattened, and rise perpendicularly from each other, 

 becoming suddenly plane on the top, the ribs being continued across this 

 flattened space. 



6. F. linearis, shell fusiform, ribbed transversely and crossed with 



elevated stri8e nodulous on the ribs, the interstices smooth ; whorls 



six or seven, convex, the ribs about ten, and the cross lines eight 



on the body ; aperture oval, the beak shorter than its length, 



straight, the outer lip thickened, the pillar plain. Length i%ths. 



Flem. Brit. Anim. 350. Murex linearis, Mont. Test. Brit. 261. t. 9. 



fig. 4. 



Hah. Berwick Bay, in sand, not uncommon. 



Our specimens are dead shells, procured from among sea-sand. They are whitish, 



with a purplish apex, and marked spirally with reddish-brown lines, for the | 



spiral striae are of this colour. 



7. F. costatus, shell fusiform, slender, of a yellowish-brown colour, 



smooth ; whorls six, transversely ribbed, the ribs nine on the body, 

 slightly waved, obtuse, continuous ; aperture oval, with a short 

 wide canal and plain lips. Length Aths ; breadth -fVth. Flem, 

 Brit. Anim. 348. Murex costatus, Mont. Test. Brit. 265. 



Hah. In shell sand, very rare. 



The apical or primary whorls are not ribbed. The shell is very smooth, and 

 somewhat glossy. 



8. F. nelula. Mont. Test. 'Brit. 267, pi. 15, fig. 6. F. pyramidatm. 



Brown's Conchology, pi. 48, fig. 19, 20. 



Hah. Coldingham Bay, Mr Robert Maclaurin. " Found by me at St Abb's Head," 

 Brown. 



Mr Maclaurin's specimen is an old and worn one, nine lines in length, and three 

 in diameter where broadest, of a dull brownish colour, stained with ex- 

 traneous matter, opaque and thickish, and appears to have been coated with 

 a yellowish-brown epidermis, minutely reticulated in its fresh condition. 

 The description must consequently be imperfect. Shell turreted, with 

 nine ribbed whorls tapering gradually to a point : whorls very slightly 



