276 GINGLYMACONCHA. PANDORAD. 
This species is very common in the British Seas, everywhere 
in deep water or sandy bottoms. 
Genus 25. PANDORA. 
Pandora, Lamarck. 
Shells regular, inequivalve, inequilateral, transversely oblong ; 
the left valve rather flat; the right valve convex ; the hinge 
with two oblong, divaricating, unequal teeth in the left valve ; 
and two foveolze or small excavations in the right valve. 
The animal is unknown to me. 
1. PANDORA ROSTRATA. 
Shells pearly, the anterior aspect the longest, attenuated and 
rostrated ; thus angulated in each valve ; the epidermis yellow- 
ish white. Length one and three-eighths ; height five-eighths 
of an inch. 
Tellina inzequivalvis, Linn. Syst. Nat. 1118; Gronov. Zooph. 
t. xvil. f. 3; Brunnich, Besch. Berl. Natur. f. iii. 313. t. 
vil. f. 25-28; Chem. Conch. vi. t. xi. f. 116, a, 6, ¢; Poli, 
eS Ate RV. 90,09: 
Pandora margaritacea, Lam. Encycl. Méth. t. cel. f. 1. a, 6, ¢; 
Syst. des Anim. sans Vert. v. 137. 
Pandora rostrata, Lam. Hist. Nat. des Anim. sans Vert. v. 
498. 
This species has been taken on the southern coasts of Ire- 
land, and is extremely rare. It is common in the Mediterra- 
nean ; and occasionally is found at La Manche on the French 
coast. 
2. PANDORA OBTUSA. 
Shell pearly, with divaricating strie ; the hinder aspect 
towards its extremity dilated and very obtuse, hence obtusely 
angulated; the epidermis whitish, inclining to yellowish. 
Length one and two-eighths ; height four-eighths of an inch. 
Mya striata, Mont. Trans. Linn. Soc. xi. t. xiii. f. 1. A; Dill. 
Desc. Cat. 143; Turt. Conch. Dict. 105. 
