9 fi 9 



T. testa T. pisiformi similhma, pallidiore autem et margine ven- 

 trali magis arcuato; striis obliquis, fortioribus, flexuosis, postice 

 bis terve in ziczac flexis ; ligamento minimo, 



Extremely like T. pisiformis, but paler and more arcuated at the 

 ventral margin ; the oblique striae are flexuous and more deeply 

 impressed than in that species, and at the posterior extremity se- 

 veral times change their direction at acute angles, thus forming 

 numerous zigzag lines ; the ligament is minute and not prominent. 



United States. 



73. Tellina fimbuiata (pi. lx. f. 132.) Hanley, Zool. Proc. 

 1844. 



T. testa obovato-suborbiculari, solida, convexa, impolita, intus 

 extusque Candida, striis concentricis confertissimis lamellosis fim- 

 briatis et lineis radiantibus confertis decussata; margine ventrali 

 arcuato, postice sursum acclinato ; dorsah utrinque convexiusculo, 

 antice subdechvi, postice valde declivi ; latere antico longiore, ro- 

 tundato ; extremitate postica brevi, angulata ; costa umbonali valde 

 conspicua; ligamento infossoj lunula distincta; dentibus latera- 

 libus subremotis, subaequichstantibus. 



Eounded-obovate, solid, convex, very inec[uilateral, dull white, 

 with extremely delicate crowded lamellar striae, which are fringed 

 by the intersection of radiating lines ; one of the valves projecting 

 beyond the other at the beaks ; ventral margin arcuated and rising 

 posteriorly j anterior side the longer and rounded, its dorsal edge 

 moderately convex and sloping ; posterior side short and angulated, 

 the ligamental edge strongly sloping and tolerably convex ; fold 

 very prominent; ligament sunken; a distant lanceolate lunule; 

 inside white ; lateral teeth rather remote and subequidistant. 



Mus. Ciuning. 



74. Tellina decussata (pi. lx. f. 184.) Lam., no. 45. ; Haul- 

 Des. Cat. p. 70. ; Encyc. Meth. t. 292. f. 2. ? 



T. testa, suborbiculari, subaecpiilaterali, solida, convexa aut sub- 

 ventricosa, impolita, sordide alba, striis concentricis costellas radi- 

 antes decussantibus ; striis elevatis, confertissimis, tenuissimis ; 

 costellis nmnerosis, paululum obsoletis ; margine ventrali arcuato ; 

 dorsali utrinque declivi, antice convexo, postice convexiusculo ; la- 

 tere antico rotundato; postico obtuse angulato; ligamento infosso; 

 natibus prominuhs ; flexiua costaque umbonali inconspicuis ; den- 

 tibus laterabbus magnis, antico propinquiore. 



Var. Testa, majore, Candida, ; striis magis elevatis et minus con- 

 ertis ; margine dor sab postico elevatiore. 



