3^7 



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. 

 Cliina (Mus.Brit.). 



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

 1844. 



T. testa ovali, solidiuscula, convexa, insequilaterali, iiitida, al- 

 bida (intus Candida), laevigata, utriuque 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, wliitish, 

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

 dorsal convex and moderately sloping; posterior side decidedly 

 the shorter; beaks not prominent; fold and ilexui-e obsolete; 

 teeth minute ; inside white. 



Kamskatcldia. 



206. Tellina grandis (pi. kv. f. 247.) Ranley, Zool. Proc. 

 1844. 



T. testa ovali, subtrigona, sohda, subinsequivalvi, l8e^^, convexa, 

 subimpoKta, extus intusque albida, antice rotundata; margine 

 ventrali convexiusculo ; dorsali utrinque decKvi, postice recto aut 

 subrecto, antice vix convexiusculo ; extremitate lateris antici bre- 

 vioris obtusa ; flexura costaque umbonali subobsoletis ; ligamento 

 magno 



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

 ratlier of a dull wliite 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 , hgamental 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 (pl.lxv. f. 245, 248.) Conracl,ZQm. Ac. 

 N. S. Pliilad. vol. vii. p. 257. llanL Des. Cat. p. 67. 



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

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

 gine ventrali subarcuato ; dorsali utrinque hand midtmn declivi, 



2 B 2 



