126 



This shell was handed me for examination by Professor Green, 

 in whose cabinet the specimen is preserved; a right valve is in the 

 collection of Mr. Hyde ; in general outline it resembles fig. 3, pi. 

 287, of Encyel. Meth. 



Tellina lateralis. — Shell transversely subovate ; beak nearly 

 central ; posterior margin regularly rounded ; anterior margin ros- 

 trated, the rostrum turned to the left, and slightly gaping ; ligar 

 ment slope rectilinear ; basal margin regularly ai'cuated, a little 

 contracted near the rostrum; valves whitish, often tinged with 

 ferruginous, with small concentric wrinkles and slight waves ; 

 within white, a little sculptured with the external waves ; lateral 

 teeth none ; cardinal teeth two on one valve, and one with another 

 hardly elevated filiform one on the other. 



Inhabits the coast of the United States. Length one and eleven- 

 twentieths inch ; width two and three-twentieths inches. 



This species is more commonly found upon the Southern coast, 

 where it is abundant, but perfect specimens are very rare. 



Tellina decora. — Shell transversely subovate, rosaceous, or 

 white, with rosaceous radii ; not much compressed ; numerous, 

 minute, concentric wrinkles, and regular, oblique, equidistant lines 

 crossing them ; anterior margin destitute of the oblique lines ; 

 posterior lateral tooth of the left valve prominent, the others obso- 

 lete ; apex a little before the middle. 



Length more than one-half of an inch ; breadth seventeen-twen- 

 tieths of an inch. 



The largest specimen, brought by Mr. T. Peale from the Southern 

 coast of East Florida, is one inch in breadth. 



In the character of the oblique striae this species is allied to 1\ 

 Iris, nobis, but it is amply distinguished by its much greater size, 

 less compressed form, oblique stritc, by its color, &e. 



PsAMMOBiA PUSCA. — Shell compressed, transversely subovate, 

 thin and fragile ; wrinkled concentrically, and covered with a fus- 

 cous or yellowish-brown epidermis ; apex not prominent, central ; 

 anterior margin more narrowed than the posterior one, with a slight 

 and obtuse wave passing along the anterior submargin ; posterior 

 margin very obtusely rounded ; within white ; teeth diverging re- 

 motely, very slender, filiform, and hardly elevated. 



Var. a. Epidermis whitish, slightly tinged with yellowish. 



