272 



Elliptic, thill, depressed, scarcely glossy, white both Mitliiii and 

 without (sometimes subnacreous), with regular elevated concentric 

 striae, which are distant towards the very prominent and acute 

 beaks, but become closer towards the ventral edge (wliich is 

 rounded at both extremities, but is little convex in the middle) ; 

 the interstices of the striae quite smooth ; anterior side very slightly 

 the longer, the extremity romided ; situation of the umbonal ridge 

 indicated by a linear carina ahnost adjacent to the convex and 

 moderately sloping dorsal edge and separated from it by a narrow 

 concavity ; the beaks curved forwards ; the anterior dorsal edge 

 the less elevated, and at first running almost horizontally or even 

 slightly ascending; lunule and uymphal area excavated; front 

 lateral tooth distinct and subapproximate, the hinder one small 

 and distant. 



Probably inequivalve, but as yet I have only seen one of the 

 valves. 



Tumbez, Peru. 



92. Tellina Gouldii (pi. Ivi. f. 26.) Hanley. 



T. testa parva, oblique subovata, solida, convexiuscula, nitidis- 

 sima, extus intusqne nivea, laevigata, valde inaequilaterali ; mar- 

 gine ventrali antice fortiter arcuato, postice sursum acclinato; 

 dorsali antico subdeclivi, prope nates acutas retuso, deinde arcu- 

 ato; dorsali postico subrecto, subitoque declivi; latere postico 

 brevissimo, obtuse angulato ; extrcmitate antica rotundata ; lunula 

 parva ; flexura costaque umbonali subobsoletis ; ligamento miuimo 

 infosso ; dente laterali antico parvo et baud approximato, postico 

 rudimentah. 



Obliquely subovate, solid, small, moderately convex, very glossy, 

 quite smooth and both within and without of a pure white ; ven- 

 tral margin much arcuated in front, ascending posteriorly ; front 

 dorsal edge moderately sloping, refuse near the acute beaks and 

 then arcuated or convex; liinder dorsal edge nearly straight and 

 suddenly sloping ; sides very unequal, the liiuder peculiarly short 

 and obtusely angulated ; front extremity rounded ; fold and flexure 

 almost obsolete ; ligament minute and sunken ; a small lunule ; 

 front lateral tooth small and not approximate, liinder almost 

 rudimentary. 



West Indies; (Guilding). 



Named in honour of the talented author of the ' Report on the 

 Invertebrata of Massachusets ' . 



93. Tellina kubicunda (pi. Ixvi. f. 255.) Gould, Proc, Bos- 

 ton Nat. Hist. Soc. 1845. 



