1141 



t!ie tlTickenihg of that part. Il never is found above an inch 

 in length) for by that time it has taken a more perfe6l fliape; 



Upon the whole we cannot confider any of thefe decollated 

 fliells otherwife than the fry of fome large fpecies unformed, 

 for the fame appearance in the fry of Buccinum iindutum is 

 notorious tothofe who have taken the trouble to extra6l them 

 from the ova, fo commonly thrown in clufters upon our coaft. 



AcoiKCTUs, Shell laper, with fix or feven coflated volutions, the ribs 

 are flightly angulated, or more elevated in the middle of 

 each fpire ; the volutions arealfo finely flriated in a fpiral 

 direction : the aperture oblong ; canal fliort ; the lip intire 

 at the upper angle : colour yellowifli-white, with an obfolete 

 brown band on the middle of the lower volution, which con- 

 tinues up the fliell at the bafe of the fuperior ones ; this 

 band, by the affiftance of a lens, is obferved to be confiituted 

 by four or five contiguous thread-like lines of that colour, 

 m the deprcfTions between the Jlricc. Length four lines ; 

 breadth one line. 



This has fomewhat the habit o^ Murex gracilis, but differs 



eflentially in the aperture, and the canal, and in being defti- 

 tute of the notch at the upper angle of the aperture ; the 



fpiral y?/7<s is alfo much finer. 



In the cabinet of Mr. Laskey, who took it in deep water 

 m xhQ Frith of Forth : extremely rare^ 



Shell 



