PART II. MACROTROCHIA. TELLlNINiE. 371 



SuB-FAJi. TELLININ^. 



Animal marine ; the siphons excessively long. Shell 

 rather thin, more or less compressed ; bosses small. 



PsAMMOBiA.* Lam. (fig. 118. i.) Shell transverse, oval 

 or oblong, angulated, gapingatone or both ends ; 

 ligament external ; cardinal teeth ^. 

 rugosa Sow, Chem. 9. f. 79 — 82. ferroensis. Penn. 47. f. 31. 

 vespertina, Chem. 7. f. 59. Poll, i. pi. 15. f. 19. 



Tellina Linn. Shell transverse, greatly compressed, 

 nearly equilateral ; the valves on the inferior liga- 

 mental, or anterior side, sinuated and angulated ; 

 cardinal teeth -|, or -]- ; lateral teeth |, remote from 

 the cardinal, (Jig. 120. a.) 

 radiata. En. Meth. 289. f. 3. latirostra. Zool. II. I pi. 20. 



LuciNA Lam. Shell generally round or orbicular, 

 equilateral, the outer surface sculptured ; ligament 

 external ; cardinal and lateral teeth distinct, but va- 

 riable in their number ; anterior muscular impression 

 very long and narrow, (fig. 120, c.) 

 L. punctata. Sow. Gen. f. 1 . Pennsylvanica. f. 4. 



Ungulina f Lam. Shell irregularly orbicular ; bosses 

 central; cardinal teeth ], bifid; lateral teeth none; 

 ligament both internal and external; impression of 

 the mantle entire. 



transversa Lam. Sow. Man. f. 88. (fig. 117. d. ) 



Abiphidesma Lam, Shell resembling Lucina in shape ; 

 the posterior side sometimes flexuose, and slightly 

 gaping; cardinal teeth \ or |, with a cartilige between ; 

 ligament external. 

 A. variegata. En. Meth. 291. f. 3. lucinalis. lb. 286. f. 



LoRiPES Poli. Shell orbicular, equilateral ; cardinal 

 teeth obsolete ; lateral teeth none, 



L. lactea. Poli, i. pL 25. £ 28, 29. 



* Representing the Salens- 



t Ungulina Lam. seems to be merely an aberrant Lucina. 



