28G 



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 ibis (pi. lxvi. f. 267.) Say, Jour. Ac. Nat. Sc. 

 Philad. vol. ii. 



T. testa subovata, solidiuscula, valde inaequilatcrali, 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 deckvi, postice valde declivi; ex- 

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

 ura costaque umbonaU subinconspicuis ; dentium laterahum an- 

 tico subapproximato, postico subobsoleto. 



Subovate, tolerably strong, very inequilateral, moderately con- 

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

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

 oblique stria?, 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 hinder one particularly so ; front extremity rounded ; posterior 

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

 rather close, hinder almost obsolete. 



Carolina to Georgia, United States. 



Very closely resembling T. simiUs from which it may be distin- 

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

 posterior termination, the greater extension of its oblique stria?, 

 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. lviii. f. 88.) ; Sanguinolaria, 

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



T. testa oblonga, solidiuscula, nitida, subsequilaterali, convexius- 

 cula, laevigata, albido-aurantia (intus aurantia), cpidermide tcnuis- 

 sima. subirridescente induta, ; margine ventrali subrecto ; dorsali 

 antice subrecto paululumque declivi, postice vix convexo et valde 

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

 cuneiformi ; Hgamento baud prominente ; flexura costaque umbo- 

 nali obsoletis ; dente laterali parvo, approximato. 



Oblong, moderately strong, tolerably convex, subequilateral, 

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



