GINGLYMACONCHA. VENERID. "BI 
the epidermis yellowish, generally painted with divaricating or 
diverging rays. Length two and a half inches; height one inch 
and a quarter. 
Venus crassa, Lister, Conch. cexcix. f. 136; Gmel. Syst. Nat. 
3288. 
Pecten depressior, Da Costa, Brit. Conch. 194. t. xiii. f. 4, 
dextra. 
Tellina rigida, Pult. Cat. Dorset. 30. t. viii. f. 3; Donov. 
Brit. Shells, t. cii. 
Tellina crassa, Mont. Test. Brit. 65; M. §& R. Trans. Linn. 
Soc. vill. 55; Elem. Edinb. Encycl. 95; Wood, Gen. Conch. 
i. 186. t. xl. f. 1; Dill. Desc. Cat. 96; Turt. Conch. Dict. 
173. 
Inhabits deep water on sandy coasts; very common. 
STIRPS XI. 
Shells equivalve, cordiform ; their umbones very prominent 
and recurved; the ligament exterior and hinge-shaped ; the 
cardinal teeth not diverging ; a lamella before and behind the 
cardinal teeth. 
Genus 59. Carpium. 
Cardium, Auctorum. 
Cerastes, Poli. 
Shells with equal valves; the umbones very prominent and 
recurved ; the ligament exterior and hinge-shaped ; the hinge 
with two alternately placed teeth, the first behind, the second 
before ; the first remote from the other teeth. 
The animal with its tracheal tubes somewhat fistulose, short, 
and not produced beyond the hinder aspect of the shell; their 
extremities fringed, the under one with a pendulose valve at its 
bottom: the hinder margin of the mantle is denticulated, and 
with its double replications covers the tubes: the foot is conic, 
very much elongated and geniculated. 
P2 
