243 



in both the valves, and the whole surface is peculiarly glossy ; the 

 teeth are as in Pitnicea, but very smaU and indistinct. 

 Tumbez and Panama (Cuming). 



39. Tellina prora (pi. k. f.l52.) Hanlei/, Zool.Vmc.l^^^. 



T. testa subtrigona, ovali, soHda, convexiuscula, subsequilaterali, 

 nitida, extus intusque pallide rosea ; aut sublsevigata, aut concen- 

 trice et tenuissime striata; margiue ventraH convexo; dorsaH 

 utrinque valde et subsequahter decHvi, subrecto ; extremitate pos- 

 tica acuminata ; flexura ventraH costaque mnbonah subobsoletis ; 

 ligamento prominuloj dentibus lateraHbus magnis, antico ap- 

 proximato. 



Subtriangular^ oval, tolerably convex, soHd, glossy, nearly equi- 

 lateral, uniform pink both witliin and without, becoming deeper 

 towards the beaks, most dehcately and regularly striated concen- 

 trically ; ventral edge convex ; dorsal edges nearly equally sloping, 

 slopes strong and scarcely at aU convex ; posterior end acuminated ; 

 fold and flexure nearly obsolete ; hgament but Httle prominent, 

 both slopes being shghtly excavated; lateral teeth large, the anterior 

 approximate. 



Porto St. Elena, and Salango, West Columbia. 



40. Tellina laceridens (pl.ki. f.l68 and 176. and pi Ixvi 

 f. 258.) Hanle?/, Zool. Proc. 1844. 



T. testa oblongo-subtrigona, soHda, opaca, subsequilaterali, niti- 

 dissima, convexiuscida, alba (intus Candida), superne laevigata, in- 

 ferue concentrice et confertim striata ; margine ventraH convexius- 

 culo; dorsaH utrinque convexiusculo, et subsequahter decHvi; 

 extremitate antica rotundata (plerumque subattenuata), postica 

 rotundato-acuminata ; costa umbonah et flexura ventraH inconspi- 

 cuis ; ligamento magno, elongato, prominente ; dentibus primarus 

 laceratis, antico lateraH subapproximato, postico laterali minore, 

 remoto. 



Var. Testa magis trigona, undique sulcis confertis excavata. 



Oblong subtriangular, soHd, subequilateral, of an extremely 

 glossy enamel-Hke opaque white surface, wliich is smooth near the 

 beaks, and grooved closely towards the but slightly convex ventral 

 margin ; dorsal Hue nearly equaUy slopmg on each side, the edges 

 very shghtly convex ; anterior extremity rounded (and in the typi- 

 cal examples rather attenuated), posterior end obtusely acuminated ; 

 fold and umbonal ridge obsolete ; Hgament large, elongated, and 

 prominent; inside white; the primary teeth minutely jagged, and 



