285 



rotuudato; extremitate postica obtuse cuneiformi ; flexura costaque 

 umbonali subobsoletis ; ligamento satis prominente ; deute laterali 

 distincto, subapproximato. 



Suboval, inequilateral, rather compressed, very tliiu, pellucid, 

 wliite, with regular and not very close oblique striae ; ventral edge 

 nearly straight ; dorsal margin more or less convex and not greatly 

 sloping in front, nearly straight and moderately sloping beliind ; 

 anterior side the longer, rounded; posterior extremity obtusely 

 wedge-shaped ; ligament moderately prominent ; fold and flexure 

 obsolete ; lateral tooth distinct, subapproximate. 



Chiriqui, West Columbia. 



119. Tellina similis (pi. Ivii. f. 65.) Sowerhy, Brit. Miscel 

 pi. 75 ; Mont. Test. Brit. Sup. p. 167; Turt. Biv. Brit. p. 102; 

 Philip. Ab. und Bes. Conch, part 9. pi. 5. f. 7. 



T. testa subovali, solidiuscula, insequilaterali, convexa, nitida, 

 extus intusque albida, concentrice et obHque striata; striis obli- 

 quis, miuutis, confertissimis ; ultima parte postica altera in val- 

 vula sublsevigata, in altera autem striis subimbricatis haudque 

 confertis concentrice exarata ; margine ventrali subrecto ; dorsali 

 antice convexiusculo, postice brevi subretuso, utrinque paululum 

 declivi; latere autico longiore, rotundato; extremitate postica 

 obtuse biangulata; costa umbonali satis conspicua; ligamento 

 prominente ; dente laterali magno, approximato. 



Suboval, moderately strong, inequilateral, convex, glossj^, wliitish 

 both witliin and without, wdth a few concentric aiid crowded mi- 

 nute obhque strise, which do not extend to the obtuse liinder 

 extremity, but are replaced before reacliing the distinct umbonal 

 ridge, by not very close subimbricated striae (obsolete in one of the 

 valves) ; ventral edge straightish ; dorsal not greatly sloping on 

 either side, convex in front, short and retuse behmd ; anterior side 

 the longer, rounded; ligament prominent; lateral tooth large, 

 approximate. 



West Indies. 



120. Tellina decora (pi. Ivi. f. 27., Hx. f. 127., and kvi. 

 f. 260.) Say, Jour. Acad. Pliilad. voL v. 



T. testa T. simili simiEima, sed minore, magis convexa, maois 

 ineequilaterali, radiis angustis roseis ornata ; margine cardinali roseo 

 sub ligamento. 



Very like a young Similis (of which it may possibly prove a 

 variety), but decidedly more convex than specimens in that stage, 

 and when adult much more inequilateral than full gromi shells of 



u 



