272 



Elliptic, thin, depressed, scarcely glossy, white both within 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 (which 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 rounded ; situation of the umbonal ridge 

 indicated by a linear carina almost 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 nymphal 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. lvi. f. 26.) Hanley. 



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

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

 gine ventrali antice fortiter arcuato, postice sursum acclinato; 

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

 ato ; dorsab postico subrecto, subitoque deebvi ; latere postico 

 brevissimo, obtuse angulato ; extremitate antica rotundata ; lunula 

 parva ; flexura costaque umbonali subobsoletis ; ligamento minimo 

 infosso ; dente laterab antico parvo et baud approximato, postico 

 rudimentah. 



Obbquely 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 ; hinder dorsal edge nearly straight and 

 suddenly sloping ; sides very unequal, the hinder 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, hinder abnost 

 rudimentary. 



West Indies; (Guilding). 



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

 Invertebrata of Massachusets '. 



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

 ton Nat, Hist. Soc. 1845. 



