241 



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

 evanescentibus ; margine ventrali subrecto, medio subretuso ; dor- 

 sali utriiique subsequaliter dcclivi, postice subrecto ; latere antico 

 paululum breviore, ad extremitatem obtuse rotuiidato ; extremitate 

 postica superne angulata, attenuata; costa umbonali et flexura 

 ventraH obsoletis ; ligamento prominulo ; dentibus ut in Puniced. 



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

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

 subpellucid purpHsh crimson; the surface marked with distant 

 concentric grooves, wliich posteriorly become obsolete in one or 

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

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

 tusely rounded; posterior extremity ahnost biangiilated ; dorsal 

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

 nearly straight posteriorly ; umbonal ridge and flexure nearly obso- 

 lete ; the hgament rather prominent ; teeth as in Funicea. 



Most closely allied to Pimicea, but its deep purphsh red, and 

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

 differs by the absence of radiating strise; from Siriata, by its 

 slif^htly longer posterior side ; from Bubescens, by its colouring, 

 and the lesser slope of the dorsal edges. 



Real Lleijos, Central America. 



36. Tellina eburnea (pi. lviii,f. 91.) Hanky, Zool. Proc. 



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

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

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

 oine ventraU convexiusculo, antice sursum acclinato ; dorsali antice 

 subrecto, leviterque dechvi, postice recto subitoque decHvi ; latere 

 postico multum breviore, subcuneiformi ; lineis erectis obhquis 

 aream nymphalem et analem rugantibus ; Hgamento brevi, promi- 

 nente; flexura ventrali costaque umbonali subobsoletis ; superficie 

 interna can(hda ; dentibus lateraHbus, ut in Puniced. 



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

 clearly inequilateral, with strong deep concentric sulci, which 

 usually become obsolete in one of the valves, and wliich diverge 

 and become elevated on passing the flattened space at the upper 

 edo-e of the more convex valve; ventral edge very shghtly convex, 

 curvino- obhquelv upward anteriorly; posterior side much the 

 shorter^ subcuneiform ; the ligamental edge straight, and abruptly 

 sloping; ligament short and prominent; fold and umbonal ridge 

 almosf obsolete ; inside pure white, teeth as in Pwticea. 



