TELLINA. 157 



FLAT TELLEN. 



24. Tellina planata. T. testa ovata, compressa, transversim substriata, 



Icevi; marginibus acutis. Linn. Syst. Nat. ed. 12. p. 1117. Linn. 



Gmel. p. 3232. 

 Shell oval, compressed, transversely substriated, smooth; margins 



acute. 

 Gualt. Test. pi. 89. f. G. Rugenf. Conch, pi. 3. f. 28. Born Test. pi. 2. 



f.9. 



A very flat shell, pellucid, and of a flesh colour ; 

 slightly curved, with very sharp margins. 



This species has been confounded with the T. tenuis ; 

 but it is evident, from his references, that Linnaeus meant 

 a different shell. Gmelin's T. complanata, p. 3239, is this 

 shell. 



SHARP-EDGED TELLEN. 

 PL 44. /. 1. 



25. Tellina acuta. T. testa ovata, compressa, longitudinaliter subtilissime 



striata ; marginibus acutis. 

 Shell oval, compressed, very finely striated longitudinally; margins 



sharp. 



This is a flat, thin, pellucid shell, of a white colour, 

 with a tinge of yellow near the apex, but not perceptibly 

 rayed. The surface is marked longitudinally with ex- 

 tremely fine striae ; the beak is slightly curved, and the 

 angle is determined by a concavity running from the 

 apex to the margin, in the upper shell ; the margins are 

 very sharp-edged. The hinge has two teeth in one valve, 

 and one in the other ; there is but one lateral tooth. 



