241 



cente ; concentrice sulcata, sulcis remotis, altera in valvula postice 

 evanescentibus ; margine ventrali subrecto, medio subretuso ; dor- 

 sali utrinque subsequaliter declivi, postice subrecto ; latere antico 

 paululum breviore, ad extremitatem obtuse rotundato ; extremitate 

 postica, superne angulata, attenuata; costa umbonali et flexura 

 ventrali obsoletis ; Hgamento prominulo ; dentibus ut in Puniced. 



Oblong, thin, rather compressed, almost inequivalve, subequi- 

 lateral ; extremely glossy, both externally and internally of a deep 

 subpellucid purplish crimson; the surface marked with distant 

 concentric grooves, which posteriorly become obsolete in one or 

 both of the valves ; the ventral edge nearly straight, subretuse in 

 the middle ; anterior side slightly the shorter, its extremity ob- 

 tusely rounded; posterior extremity almost biangulated; dorsal 

 moderately and almost equally sloping on either side of the beaks, 

 nearly straight posteriorly ; umbonal ridge and flexure nearly obso- 

 lete ; the ligament rather prominent ; teeth as in Punicea. 



Most closely allied to Punicea, but its deep purplish red, and 

 its more distant sulci suffice to distinguish it. From Princeps it 

 differs by the absence of radiating striae ; from Striata, by its 

 slightly longer posterior side; from Pubescens, by its colouring, 

 and the lesser slope of the dorsal edges. 



Real Lleijos, Central America. 



36. Tellina ebtjrnea (pi. lvii. f. 91.) Hanley, Zool. Proc. 

 1844. 



T. testa, oblonga, opaca, solida, inrequivalvi, convexa, nitida, 

 albida, insequilaterali ; concentrice sulcata, sulcis profundis, remo- 

 tis, (altera in valvula, nonnunquam postice evanescentibus) ; mar- 

 gine ventrali convexiusculo, antice sursum acclinato ; dorsali antice 

 subrecto, leviterque declivi, postice recto subitoque declivi ; latere 

 postico multum breviore, subcuneiformi ; lineis erectis obhquis 

 aream nymphalem et analem rugantibus ; ligamento brevi, promi- 

 nente ; flexura ventrali costaque umbonali subobsoletis ; superficie 

 interna Candida ; dentibus lateralibus, ut in Puniced. 



Oblong, solid, opaque, rather inequivalve, convex, whitish, glossy, 

 clearly inequilateral, with strong deep concentric sulci, which 

 usuaUy become obsolete in one of the valves, and which diverge 

 and become elevated on passing the flattened space at the upper 

 edge of the more convex valve ; ventral edge very slightly convex, 

 curving obliquely upward anteriorly; posterior side much the 

 shorter, subcuneiform ; the ligamental edge straight, and abruptly 

 sloping ; ligament short and prominent ; fold and umbonal ridge 

 almost obsolete ; inside pure white, teeth as in Punicea. 



