272 



Elliptic, thin, depressed, scarcely glossy, white both mtliin 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 strise quite smooth ; anterior side very slightly 

 the longer, the extremity rounded ; 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 fkst running almost horizontally or even 

 slightly ascending; lunule and nymphal area excavated; fi'ont 

 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.) HanleT/. 



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

 sima, extus intusque nivea, l8e^^gata, valde insequilaterali ; mar- 

 gine ventrali antice fortiter arcuato, postice sursum acclinato; 

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

 ato; dorsah postico subrecto, subitoque decKvi; latere postico 

 brevissimo, obtuse angulato ; extremitate antica rotundata ; lunula 

 parva ; flexm-a costaque umbonali subobsoletis ; ligamento minimo 

 infosso ; dente laterali antico parvo et baud approximato, postico 

 rudimentah. 



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

 quite smooth and both witliin and without of a pure wliite ; 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 

 suddeidy sloping ; sides very unequal, the liinder peculiarly short 

 and obtusely angidated ; front extremity rounded ; fold and flexure 

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

 front lateral tooth small and not approximate, hinder almost 

 rudimentary. 



West Indies; (Guilding). 



Named in honour- of the talented author of the ' Eeport on the 

 Invertebrata of Massachusets '. 



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

 ton Nat. Hist. Soc. 1845. 



