34 PROCEEDINGS OF THE [Dec., 1860. 



posterior one, the hinge slope declining in a very slightly arcuated line, to a 

 sub-acute termination ; basal margin nearly rectilinear from behind the middle 

 to the anterior termination ; a lateral tooth behind the primary teeth. 



Length two-fifths of an inch. Breadth thirteen-twentieths of an inch. In- 

 habits the Southern Coast, not unfrequently on the beach of South Carohna 

 and East Florida. " • - 



It is common at Sullivan's Island. 



6. Tellina iris. 



Tellina iris, Say, June, 1822. 



Say's description: "Shell very thin and fragile, pellucid, compresse'd, 

 transversely oblong-suboval, iridescent, white, with generally a rosaceous disk 

 and one or two anterior rays, with numerous minute concentric wrinkles, and 

 minute, oblique, acutely impressed, equidistant striae crossing them ; striae ab- 

 breviated before and not attaining the anterior margin, which is narrowed and 

 sub-acute ; basal edge rectihnear opposite to the beaks. 



Length more than three-tenths of an inch. Breadth more than eleven-twen- 

 tieths of an inch. 



Inhabits the Southern Shores. A beautiful little species, very remarkable by 

 the oblique course of the striae. It is rather common." 



7. Tellina mera. 



Tellina mera, Say, PI. 64, fig. 2. Binn., Ed. Say, p. 228. 



Say's description : ''Specific GJiaracter. Ovate-orbicular, transversely stri- 

 ated, hinge anterior to the middle, bidentate with a lateral tooth in one valve. 



Besc. Shell small, thin, white, not very convex, somewhat regularly striated 

 transversely ; beaks forming a rather prominent angle ; anterior side with an 

 obvious undulation, and rectihnear as far as double the length of the ligament ; 

 at tip rounded ; ligament rufous ; posterior side nearly rectilinear half the dis- 

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

 rounded ; basal margin obtusely and regularly arcuated ; hinge with two prima- 

 ry teeth in each valve ; posterior tooth small and triangular ; anterior tooth 

 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 remark- 

 ably large, in its posterior curvature almost confluent with the tip of the mus- 

 cular impression. 



Ohs. Inhabits Coast of South Carolina. Dr. Eavenel. 



In a particular light it has a slight appearance of longitudinal lines." 



I sent to Mr. Say a single specimen of this shell, tlic only one which I had 

 then seen, the specimen was not returned to me ; it was probably a young shell 

 and immature, the specimen now in my Cabinet is a thick strong shell ; white, 



