AiYxY. GAPER. 
10! 
Shell very light and brittle, remarkably convex, strongly 
angular at the anterior side, covered with an ochraceous 
skin, under which it is clear white, rather rough on the an¬ 
gular side; inside yellowish white: hinge with a small 
oval tooth projecting horizontally: length about an inch ; 
breadth an inch and a half. 
Mr. Wood observes that it is certainly distinct from both 
the last, in its great convexity, and comparative lightness. 
Devonshire, and Dublin bay : very rare, v . m. 
7. Mya prretenuis Spoon-hinge Gaper. 
Montagu , pi. 1. f. 2 — Donovan, pi. 176— Wood, , pi. 24. 
f. / to 9 — Dorset Cat. pi. 4. f. 7* 
Shell oval, fiat, thin, brittle, semitransparent, slightly 
and iiregularly striate transversely, rounded at both ends, 
narrowed and rather pointed at one end, a little depressed 
at the front margin near the smaller end, in consequence 
of that part being somewhat turned up to form a small 
gape : color whitish, a little roughened and inclining to 
brown at the smaller end : beaks small, pointed, nearly 
central, inclining to one side; in.qde white but not polished, 
with two small ribs which run obliquely from the hinge 
halfway down the cartilage side, leaving between them a 
ling triangular glossy iridescent space: hinge with a broad 
projecting hollow spoon-shaped tooth in each valve, 
strongly striate concentrically: length an inch; breadth an 
inch and a half. 
Montagu, in his figure, has represented the truncated 
fide of Mya declivis, but the tooth is that of M. praetenuis. 
The outline of this shell much resembles that of the Mya 
arenaria. The figure in the Dorset Catalogue is an exact 
and beautiful representation; all the others quoted are in** 
different. 
Western coasts, and Dublin bay. v. v. 
8. Mya distorta. Deformed Gaper , 
Montagu , pi. 1. f. 1. 
Shell somewhat oval, thin, brittle, semitransparent, 
white; the valves convex, of a nigged and variously dis¬ 
torted appearance, and more or less indented at the mar¬ 
gin; inside white: hinge with a broad somewhat triangu- 
k 3 la; 
