rounded at its extremity, its dorsal edge scarcely at all sloping and 

 moderately convex. ; posterior extremity obtuse, the hinder dorsal 



edge moderately sloping and nearly straight ; ligament ? ; 



umbonal ridge obsolete ; inside white. 

 China (Mus. Brit.). 



205. Tellina frigida (pi. lix. f. 119.) Hanky, Zool. Proc. 

 1844. 



T. testa ovali, solidiuscula, convexa, iiiBequilaterali, nitida, al- 

 bida (intus Candida), laevigata, utrinque rotundata; margine ven- 

 trali convexo ; dorsali antico subdeclivi, convexo ; latere postico 

 plane breviore ; natibus inconspicuis ; flexura. costaque umbonali 

 obsoletis ; dentibus minimis. 



Oval, tolerably strong, convex, inequilateral, glossy, whitish, 

 smooth, rounded at each extremity ; ventral edge convex ; front 

 dorsal convex and moderately sloping; posterior side decidedly 

 the shorter; beaks not prominent; fold and flexure obsolete; 

 teeth minute ; inside white. 



Kamskatclika. 



206. Tellina grandis (pi. lxv. f. 247.) Hanley, Zool. Proc. 

 1844. 



T. testa ovali, subtrigona, solida, subinsequivalvi, lfevi, convexa, 

 subimpohta, extus intusque albida, antice rotundata; margine 

 ventrali convexiusculo ; dorsah utrinque declivi, postice recto aut 

 subrecto, antice vix convexiusculo ; extremitate lateris antici bre- 

 vioris obtusa ; flexura costaque umbonali subobsoletis ; hgamento 

 magno 



Subtriangularly oval, solid, slightly inequivalve, convex, smooth, 

 rather of a dull wlute under an almost imperceptible epidermis, 

 which is only visible near the but little convex ventral margin ; 

 anterior side clearly the longer, its extremity rounded, its dorsal 

 edge but little convex and moderately sloping , ligamental edge 

 straight, and strongly sloping ; posterior termination obtuse ; fold 

 and flexure almost entirely obsolete ; inside white, the hinge-plate 

 strong, the teeth of a moderate size. 



Tumbez, Peru. 



207. Tellina secta (pi. lxv. f. 245, 248.) Conrad, Jour. Ac. 

 N. S. Philad. vol. vii. p. 257. HanLDes. Cat. p. 67. 



T. testa solidiuscula, infequivalvi, nitida, extus intusque Can- 

 dida, laevigata ; altera valvida convexa, altera complanata ; mar- 

 gine ventrali subarcuato ; dorsali utrinque hand multuin declivi, 



2 b 2 



