286 



the preceding species; delicately coloured by narrow lighter or 

 darker tinged crimson rays, and the hinge margin stained with 

 rose-colour beneath the ligament ; ventral edge decidedly convex. 

 Honduras (Dyson) ; Florida. 



121. Tellina iris (pi. Ixvi. f. 267.) %, Jour. Ac. Nat. Sc. 

 Pliilad. vol. ii. 



T. testa subovata, solidiuscula, valde insequilaterali, nitida, satis 

 convexa, extus intusque albida, antice radio subluteo obsolete picta, 

 striisque obliquis confertis utraque in valvula insculpta ; margine 

 ventrali antice subarcuato, postice sursum acclinato ; dorsali 

 utrinque convexiusculo, antice decK\% postice valde decHvi; ex- 

 tremitate antica rotundata ; latere postico brevi, cuneiformi ; flex- 

 ura costaque umbonali subinconspicuis ; dentium laterahmn an- 

 tico subapproximato, postico subobsoleto. 



Subovate, tolerably strong, very inequilateral, moderately con- 

 vex, glossy, wliite both within and without, with a yellowish ante- 

 rior indistinct ray at the umbones, and very distinct and numerous 

 oblique strise, which in both of the valves reach even to the but 

 little prominent umbonal ridge ; ventral edge subarcuated in front, 

 and rising posteriorly ; dorsal edges moderately convex, sloping, 

 the liinder one particularly so ; front extremity rounded ; posterior 

 side short and wedge-shaped; front lateral tooth distinct and 

 rather close, liinder almost obsolete. 



Carolina to Georgia, United States. 



Very closely resembling T. shnilis from wluch it may be distin- 

 guished by the much greater slope of its dorsal edges, its pointed 

 posterior termination, the greater extension of its oblique striae, 

 and the presence of a second (though indistinct) lateral tooth. 

 Mr. Say adds, " it has generally a rosaceous disk and one or two 

 posterior (i. e. anterior) rays.'" 



122. Tellina iridescens (pi. Iviii. f. 88.); Sanguinolaria, 

 Benson, Annals Nat. Hist. 1842. vol. ix. 



T. testa oblonga, sohdiuscula, nitida, subfequilaterali, convexius- 

 cula, Isevigata, albido-aurantia (intus aurantia), epidermide teuuis- 

 sima subirridescente induta; margine ventrali subrecto; dorsali 

 antice subrecto paululumque dechvi, postice vix convexo et valde 

 declivi ; extremitate antica rotundata ; latere postico, vix breviore, 

 cuneiformi ; ligamento hand prominente ; flexura costaque umbo- 

 nali obsoletis ; dente laterali parvo, approximato. 



Oblong, moderately strong, tolerably convex, subcquilateral, 

 smooth, glossy, pale orange, covered by a very thin shghtly irri- 



