303 



Closely resembling a young Elongata, but more convex, and the 

 hinder side obtusely wedge-shaped and slightly beaked ; the hinder 

 extremity not in the slightest degree truncated, but the ligamental 

 edge sweeping to the lower margin in a concave and then convex 

 curve. 



Luzon, Pliilippines. 



158. Tellina ulium (pi. Iviii. f. 85.) Ranley, Zool. Proc. 

 1844. 



T. testa ovato-oblonga, tenuiuscula, convexa aut subventricosa, 

 extus intusque alba ; concentrice substriata, striis supra costam 

 umbonalera elevatis ; margine ventrali subrecto antice sursum ac- 

 clinato ; dorsali antice subrecto paululumque dechvi, postice valde 

 declivi et prope ligamentum prominulura recto deindeque convexo ; 

 extremitate lateris antici producti inferne et oblique rotundata ; ex- 

 treraitate postica brevi, cuneiformi. 



Ovate-oblong, rather thin, convex or subventricose, white both 

 within and without, with concentric striulse, and obsolete radiating 

 lines, wliich latter are most perceptible in the younger specimens, 

 the striulse elevated upon and beyond the tolerably distinct fold ; 

 anterior side produced, its dorsal edge nearly straight, and scarcely 

 sloping, its extremity obliquely rounded near the straight ventral 

 margin ; posterior side short and wedge-shaped ; the ligamental 

 edge straight, but convex at the extremity ; ligament small, and 

 moderately prominent. 



Isles of Burias and Negros, Pliilippines. 



159. Tellina tenta (pi. Ixvi. f. 266.) Say, Am. Conch. 

 t. 65. f. 3 ; Gould, Invert. Massach. p. 68. f. 43. 



T. testa oblonga, tenuissima, subflexuosa, convexiuscula, extus 

 intusque albida, laevigata, valde insequilaterali ; margine ventrali 

 subrecto ; dorsali antice convexo (aut subarcuato) et paululum de- 

 clivi, postice retuso et subdecHvi ; latere postico brevi, ad extremi- 

 tatem angustato et paulidum subrostrato ; extremitate antica rotxm- 

 data; costa umbonali subinconspicua; ligamento parvo, prominente; 

 superficie interna lineis radiantibus ornata ; dentibus minimis. 



Oblong, very thin, rather flexuous, moderately convex, wliitish, 

 very inequilateral, very nearly if not quite smooth , ventral margin 

 straightish; front dorsal edge convex or subarcuated, and very 

 little sloping ; hinder one retuse and moderately sloping ; posterior 

 side short, narrowed and very sHghtly beaked at its termination, 

 the tip truncated or subemarginated ; anterior end rounded ; fold 



Y 2 



