38 PKOCEEDINGS OF THE [Dec., 1860. 



This species is occasionally found upon the beaches near Charleston, So. Ca., 

 but is quite rare. It is not uncommon on the Florida Shores. 



10. Tellina brevifrons. 



Tellina brevifrons, Say, PI 64, fig. 1. Binn. Ed. Say, p. 

 227. 



Say's description : "Specific Character. Ovate, white, tinged with yellow- 

 ish ; anterior side very short. 



Desc. Shell thin and fragile, not very convex, white, tinged particularly 

 on the umbo, with pale dull fulvous ; with transverse slender striae, and in a 

 particular light, obsolete longitudinal striae are visible ; beaks much anterior to 

 the middle, forming an angle in consequence of the anterior and posterior hinge 

 margins being rectilinear to a considerable distance, the latter parallel to the 

 base ; anterior side short and abrupt, rounded at tip, and with a sub-marginal 

 undulation ; posterior side more than as long again as the anterior, rounded at 

 tip ; within much more deeply colored with fulvous ; cardinal teeth two in the 

 left valve and one in the right valve, lateral teeth none, 



Obs. Inhabits the Coast of South Carolina. 



The outline of this shell corresponds with T. donacina, Lin. but is more con- 

 vex, and not radiated with reddish. Dr. Ravenel informs me that it is very 

 rare, he obtained but a single specimen, which he obligingly sent to me for 

 examination. It also resembles T. decora, Say, and may readily be mistaken 

 for it, but is altogether destitute of oblique striae and rosaceous radiations. " 



This shell is occasionally found upon our shores but is very rare. 



11. Tellina omoia. 



Tellina tenuis, Say, figure without description. Binn. Ed. 

 Sap, 229, PI 64, fig. 3. 



Shell oval-triangular ; beaks behind the centre, somewhat prominent ; ante- 

 rior end, from the beaks to a point opposite to them on the basal margin, regu- 

 larly rounded, the posterior portion of the basal margin straight to the tip ; 

 posterior end narrowed, truncated, angulated ; hinge slope straight to the up- 

 per angle ; with a rather decided undulation from the beaks to the posterior 

 tip. 



Shell smooth, somewhat polished, with line irregular concentric striae, some 

 of them stronger than others ; color dull white, the portion next the beaks 

 darker than near the margin ; the right valve is rather flatter than the other, 

 particularly so from the beak to the posterior tip ; with a slight depression on 

 the side extending obliquely from the beak to the base, which gives the shell 

 a slight twist when viewed either from the hinge, or basal margin ; within this 

 depression there are some obsolete longitudinal rays. 



