326 



ventral edge nearly straight; anterior side attenuated, produced 

 and rounded, its dorsal edge sloping and tolerably convex ; poste- 

 rior side nearly wedge-shaped, the extremity narrow and subangu- 

 Jated, the dorsal edge straight, rather long in proportion and strongly 

 si oping; flexure almost entirely obsolete; ligament large and 

 s unken ; inside white ; teeth distinct. 

 Bay of Manilla (Cuming). 



Not unlike Gulernacidum but the hinder side in that species is 

 less wedge-shaped, the tip being broader, and the ligamental edge 

 decidedly shorter. 



203. Tellina pellucida (pi. lix. f. 118.) PMUpjpl, Ab und. 

 Bes. Conch, part 3. t. 5. f. 4. 



T. testa ovata, aut obovata, tenui, insequilaterali, convexa, nitida, 

 extus intusque nivea, laevigata ; margine ventrali convexo, postice 

 sursum accliuato ; dorsali antice convexo et paulo declivi, postice 

 convexiusculo et dechvi ; extremitate lateris antici longioris rotun- 

 data; extremitate postica obtusa aut rotundata; natibus acutis, 

 baud proniinentibus ; ligamento fulvo, infosso ; costa umbonali 

 obsoleta; dentibus angustis, minimis. 



Var. Testa abbreviata, ; margine dorsali utrinque magis declivi 

 et minus convexo. 



More or less ovate, thin, decidedly convex, inequilateral, pure 

 glossy white both within and without, smooth, or with a few lines 

 of growth; anterior side the longer, its extremity rounded, its 

 dorsal edge convex and but little sloping ; hinder side clearly the 

 shorter, its dorsal edge sloping and but slightly convex, tip ob- 

 tusely rounded ; ventral edge convex (or even subarcuated) and 

 inclining upward posteriorly ; ligament yellow and sunken ; beaks 

 acute bat not prominent; umbonal ridge obsolete; teeth minute. 



Var. Abbreviated; the dorsal edges more sloping and less 

 convex. 



Bay of Manilla (Cuming). 



201. Tellina Chinensis (pi. lvi. f. 18.) Hanley, Zool. Proc. 

 1844. 



T. testa ovali, solidiuscula, convexa, subinaequilaterali, impolita, 

 extus intusque Candida, laevigata ; margine ventrali subrecto ; dor- 

 sali antice convexiusculo et paululum declivi, postice subrecto 

 satisque declivi ; extremitate postica obtusa; latere antico longiore, 

 rotundato ; ligamento ? ; costa umbonali obsoleta. 



Oval, tolerably strong, convex, slightly inequilateral, dull white, 

 smooth ; ventral edge nearly straight ; anterior side the longer, 



