302 



T. testa elongato-oblonga, subsequivalvi, maxime insequilate- 

 rali, extus intusque Candida, laevigata, convexa aut subventricosa ; 

 margine ventrali postice convexiusculo, antice arcuato et sursum 

 acclinato ; dorsali antice convexiusculo paululmnque declivi, pos- 

 tice retuso et valde declivi, extremitate antica rotundato-attenuata; 

 latere postico brevissimo, obtuse cuneiformi ; ligamento subinfosso; 

 costa umbonali subobsoleta ; dentibus minimis. 



Elongated-oblong, subequivalve, extremely inequilateral, white 

 both within and without, convex or subveutricose, smooth, with 

 however obsolete radiating lines, and very indistinct striulae towards 

 the ventral margin, which latter is straightish' behind, but curves 

 upward in front, so as somewhat to attenuate the rounded anterior 

 extremity ; front dorsal edge scarcely at all sloping, rather convex ; 

 posterior side very short and obtusely wedge-shaped, the dorsal 

 edge refuse and decidedly sloping ; ligament rather sunken ; fold 

 nearly obsolete ; teeth minute. 



China (?) Mus. Metcalfe. 



Very closely allied to Galatgea, but narrower, more convex, and 

 utterly devoid of those radiating lines of raised dots, which are so 

 characteristic of that species. The posterior extremity is more 

 regularly cuneiform, and the anterior termination more attenuated. 



156. Tellina elongata (pi. lxii. f. 199.) Hdfaley, Zool. Proc. 

 1844. 



T. testa elongata, angusta, tenuiuscula, satis convexa, extus in- 

 tusque Candida, laevigata, valde inaequilaterali ; margine ventrali 

 medio subretuso, antice oblique arcuato ; dorsali antice subhori- 

 zontali et subrecto, postice subdeclivi et subretuso; extremitate 

 lateris antici longioris obtusa postica, acuminato-truncata ; liga- 

 mento infosso ; flexura obsoleta ; dentibus parvis. 



Elongated, narrow, thinnish, moderately convex, smooth, white, 

 very inequilateral ; ventral edge rather refuse in the middle, and 

 obliquely arcuated anteriorly ; anterior side the longer, its extre- 

 mity obtuse, its dorsal edge almost horizontal and nearly straight ; 

 hinder extremity with a truncated acumination, the ligamental edge 

 slightly incurved and moderately sloping; flexure obsolete ; liga- 

 ment sunken ; inside white ; teeth small. 



Chiriqui, West Columbia. 



157. Tellina assimilis (pi. lviii. f. 95.) Hanky, Zool Proc. 

 1844. 



T. testa T. elongata? simillima, convexiore autem, et latere postico 

 obtuse cuneiformi paululumque subrostrato. 



