PART II. MACROTROCHIA. TELLININ^. 371 



SuB-FAM. TELLININ^. 



Animal marine ; the siphons excessively long. Shell 

 rather thin^ more or less compressed ; bosses small. 



PsAMMOBiA.* Lam. (fg.llS.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 -2, remote from 

 the cardinal, (fig. 120. a.) 

 radiata. En. Meth. 289. f. 3. latirostra. Zool. 17. I. pi. 20. 



Ltjcina 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. 



UnguUna f Lam. Shell irregularly orbicular ; bosses 

 central ; cardinal teeth -i, bifid ; lateral teeth none ; 

 ligament both internal and external ; impression of 

 the mantle entire. 



transversa Lam. Sow. Man, f. 88. {fig. 117. d. ) 



Amphidesma 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. pi, 25, f, 28, 29. 



* Representing the So/ens. 



f JJngulina Lam. seems to be merely an aberrant Lucin&. 



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