36-2 



T. testa T.pisiformi simillima^ pallidiore autem et margine ven- 

 trali inagis arcuato; striis obKquis, fortioribus, Hexuosis, postice 

 bis terve in ziczac flexis ; ligamento iiiinimo. 



Extremely like T. pisiformis, l)ut paler and more arcuated at the 

 ventral margin; the oblique strise 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 no\ prominent. 



United States. 



73. Tellina FiMBRiATA (pi. Ix. f. 132.) Eanley, Zool. Proc. 

 1844. 



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

 extusque Candida, striis concentricis confcrtissimis lamellosis fim- 

 briatis et Hneis radiantibus confertis decussata ; margine veutrali 

 arcuato, postice sursum acclinato ; dorsali utrinque convexiusculo, 

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

 tundato ; extremitate postica brevi, angulata ; costa umbonaH valde 

 conspicua; ligamento infosso; limula distincta; dentibus latera- 

 libus subremotis, suba?C[uidistantibus. 



Eounded-obovate, solid, convex, very inequilateral, 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 ; anterior side the longer and rounded, its dorsal edge 

 moderately convex and slopmg ; posterior side short and angulated, 

 ' the ligamental edge strongly sloping and tolerably convex ; fold 

 very prominent; hgament sunken; a distant lanceolate lunule; 

 inside white ; lateral teeth rather remote and subequidistant. 



Mus. Cuming. 



74. Tellina decussata (pi. Ix. f. 184.) Lam., no. 45. ; Hani- 

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



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

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

 antes decussantibus ; striis elevatis, confcrtissimis, tenuissimis; 

 costellis numerosis, paululum obsoletis ; margine ventrali arcuato ; 

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

 tere antico rotundato ; postico obtuse angulato ; hgamento infosso; 

 natibus prominuHs ; llexura costaque umbonali inconspicuis ; den- 

 tibus lateralibus magnis, antico propinquiore. 



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

 ertis ; margine dorsali postico elevatiore. 



