PSAMMOBIA. 277 



P. TELLiNELLA, Lamavck. 



Small, convex, smooth, not distinctly rayed, tinged with orange 

 or livid flesh-colour or purple, almost always with a red or dark- 

 hued short linear ray on the anterior side of the beaks. Ven- 

 tral margin convex or subarcuated ; both dorsal edges slightly 

 convex : hinder end not biangulated. Ligament small, and not 

 prominent ; cardinal teeth very small. 



Plate XIX. fig. 4, and (animal) Plate K. fig, 1. 



Psammohia Tellinclla, Lam. Anim. s. Vert. (ed. Desh.) vol. vi. p, 177. — Brit. 



Marine Conch, p. 62. — Brown, lUust. Conch. G.B. p. 



102, and 133, pi. 39, f. 30 — Hanl. Recent Shells, p. 



58, siippl. pi. 11, f. 11. 



Jlorida, TvRT. DithjTa Brit. p. 86, pi. 6, f. 9. — Flem. Brit. Anim. 



p. 437. 



This pretty little Psammohia, which was first specifi- 

 cally distinguished in England by Dr. Turton, having 

 previously, in all probability, been regarded as the young 

 of vespertina, is, like it, of an oval-oblong contour, and 

 almost equilateral. It is rather convex upon the umbonal 

 region, not strong but opaque, and at most possesses an 

 extremely thin yellowish epidermis, and a very trifling 

 degree of glossiness ; its surface is smooth, and offers a 

 great variety of colouring in diflferent examples. The more 

 usual one consists of irregularly radiating specks of orange 

 or livid flesh colour, on a paler ground of the same tint, 

 and a very short orange-red linear ray in front of the 

 whitish or very pale beaks, with a similar, though less 

 distinct and still smaller one (which is sometimes obsolete), 

 lying behind them ; more rarely the valves are of an 

 almost uniform purple, with the anterior streak, however, 

 still perceptible, and often of a deeper purple. The ven- 

 tral margin is convex, or even subarcuated ; the front dor- 

 sal edge but slightly convex or sloping, and the hinder one 



