126 
This shell was handed me for examination by Professor G-reeHj 
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 Encycl. 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 ; liga- 
ment slope rectilinear ; basal margin regularly arcuated, 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 strise this species is allied to T. 
Irisj nobis, but it is amply distinguished by its much greater size, 
less compressed form, oblique striae, by its color, &c. 
PsAMMOBiA FUSOA. — 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. 
