302 



T. testa elongato-oblonga, subsequivalvi, inaxime inaequilate- 

 ralij extus intusque Candida, Icevigata, convexa aut subventricosa ; 

 margine ventrali postice convexiiisculo, antice arcuato et sursum 

 acclinato ; dorsali antice convexiusciilo paululmnque declivi, pos- 

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

 latere postico brevissimo, obtuse cuneiformi; ligamento subiiifosso; 

 costa umbonaK snbobsoleta ; dentibus minimis. 



Elongated-oblong, subequivalve, extremely inequilateral, wliite 

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

 however obsolete radiating lines, and very indistinct striula? towards 

 the ventral margin, wliicli latter is straiglitisli beliind, 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 ; hgament rather sunken ; fold 

 nearlv obsolete ; teeth minute. 



Cliina (?) Mus. Metcalfe. 



Very closely allied to Galatsea, 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. Ixii. f. 199.) Ranley, Zool. Proc. 

 1844. 



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

 tusque Candida, laevigata, valde inseqnilaterali ; margine ventrali 

 medio subretuso, antice oblique arcuato; dorsaH antice subhori- 

 zontali et subrecto, postice subdeclivi et subretuso; extremitate 

 lateris antici longioris obtusa postica acuminato-truiicata ; liga- 

 mento infosso ; tiexuifi obsoleta ; dentibus parvis. 



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

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

 obHquely 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 ; hga- 

 ment sunken ; inside white ; teeth small. 



Chiriqui, West Columbia. 



157. Tellina ASSiMiLis (pi. Iviii. f. 95.) Hanleij, Zool Proc. 

 1844. 



T. testa T. elongatse similUma, convexiore autem, et latere postico 

 obtuse cuneiformi paululumque subrostrato. 



