228 



Tellina mera. — Specific character. Ovate-orbicular, trans- 

 versely striated, liinge anterior to the middle, bidentate, with a 

 lateral tooth in one valve. 



Desc. Shell small, thin, vehite, not very convex, somewhat 

 regularly striated transversely ; beaks forming a rather prominent 

 angle ; anterior side with an obvious undulation, and rectilinear as 

 far as double the length of the ligament; at tip rounded ; ligament 

 rufous ; posterior side nearly rectilinear half the distance from the 

 beaks to the middle of the tip, which is regularly and obtusely 

 rounded ; basal margin obtusely and regularly arquated ; hinge 

 with two primary teeth in each valve ; posterior tooth small and 

 triangular ; anterior teeth thicker, obtuse and with an impressed 

 line on its summit ; a single prominent lateral triangular tooth in 

 the left valve ; sinus of the palleal impression remarkably large, in 

 its posterior curvature almost confluent with the tip of the muscu- 

 lar impression. 



Ohs. Inhabits the coast of South Carolina. — Dr. Ravenel. 



In a particular light it has a slight appearance of longitudinal 

 lines. PI. 64, fig. 2. 



Tellina alternata. — Jour. Acad. Nat. Sc, vol. 2, j^. 275. 



Obs. It is abundant in the Upper Tertiary or Newer Pliocene 

 beds near Newborn, North Carolina. — Ed.* PL 65. fig. 1. 



Tellina polita, nob. — Jour. Acad. Nat. Sc. vol. 2, p. 276. 

 PI. m,fig. 2. 



Tellina TENTA. — Specific chara,cter. Rostrum curved to the 

 left ; no lateral teeth. 



Desc. Shell transversely oblong-ovate, fragile, a little com- 

 pressed, white, with a tinge of dull yellowish towards the um- 

 bones ; wrinkles of growth not very prominent, but more obvious on 

 the anterior side ; beaks a little before the middle, not much ele- 

 vated ; anterior side narrowed, curved to the left, at tip truncated 

 or obviously emarginate ; umbonial slope hardly elevated ; within 

 with an obsolete appearance of radiating lines ; lateral teeth none ; 

 cardinal teeth in the left valve prominent ; a tinge of dull yellow- 

 ish on the disk as on the exterior. 



Ohs. Inhabits the coast of South Carolina. — Dr. Ravenel. 



The proportions of length and breadth is nearly that of Tellina 



*[T. A. Com-ad.] 



