TELLINA. 299 



lines are not unfrequently wont to appear in front and to- 

 wards the lower margin. The ventral edge is generally 

 more convex in front than behind ; Loth dorsal margins are 

 comparatively straight, the anterior being more inclined to 

 retusion, the posterior to convexity ; the declination of the 

 hinder one is moderate, the front slope is but trifling. The 

 anterior side is rather the longer, its extremity is a little 

 attenuated, and well rounded both above and below. The 

 posterior end forms an acute angle, or imperfect rostrum, 

 which is situated below the middle of the side. The um- 

 bones project but little, and are slightly recurved ; the 

 beaks are small and acute. The ligament is sunken. In- 

 ternally the colouring is usually of a deeper tone than it is 

 externally ; the hinge margin is rather narrow, and only 

 provided, in addition to the ordinary primary teeth, with 

 a single, rather approximate lateral lamina in the right 

 valve. 



Poll describes the animal as having very long rose- 

 coloured, speckled plain siphons, a strongly fimbriated 

 mantle, and a large flesh-coloured foot. 



The length of rather a large example was an inch and 

 three-quarters; its breadth exactly one inch. It is a scarce 

 British shell, and is taken sparingly in Guernsey, South 

 Devon, and Cornwall (Mont. &c.); Weymouth in seven 

 fathoms (M'Andrew and E. F.) ; Guernsey (S. H.) ; Irish 

 Sea (E. F.) ; Oxwich Bay in Glamorganshire (Jefii-eys) ; 

 Tenby (Lyons and S. H.) ; Bantry Bay (Jefi". cab.) ; and 

 other parts of the Irish coast (W. Thompson). Lamlash 

 Bay, in Arran (Smith, Alder) ; and various parts of the 

 west of Scotland (Barlee). 



It is on the whole a southern shell, and a member of the 

 Lusitanian Fauna. 



