250 CONCHYLIA— DlTi/ljR^. 56. 



Tab.nost. 11, fig. 18. 

 Tellina lacustris. Crmelin, Syst. p. 3242. 



Turton, Linn. Syst. iv. p. 197. 



Chemnitz, vi. p. 139, tab. 13, ficr. 135. 



Pennant, Brit. Zool. iv. p. 184. 



Linn. Trans, viii. p. 60. 



Wood, Concli, p. 197, tab. 47, fig. 5. 



Dillwyn, Descript. Catal. p. 104. 



Turton, Conch. Diet, p. 180. 

 C'ardium lacustre. Montagu, Test. Brit. p. 89. 



T'urton, British Fauna, p. 154. 

 Pectunculus pusillus rostratus. Lister, tab. 159, fig. 15. 

 3Ius. nost. Stagnant waters, and slow streams. 



Sliell a quarter of an inch long, and a little more in breadth, 

 slightly angular at one side, thin, transparent, often covered with 

 an ochraceous coat, sometimes black towards the beak from the 

 dried and shrunk animal, rather flat : beaks very prominent and 

 obtuse, like tubercles, which however are less visible in the young 

 ones. 



## ohliquo', inatquilaterales, 4, 5. 

 oblique and inequilateral. 



amnic*. Cyclas tcstd obUqud subdepressd in<pqmlaterali transversim 

 sulcaid, umhonibus tumidis. 

 Shell oblique rather flat inequilateral, with transverse grooves 

 .and the beaks tumid. 



