317 



iiatibus parvis acutis, proniincntibii? ; lloxiira costaquo unibonali 

 obsoletis, ligamento iJi-oiniuulo ; dcutibus aiigustissimis. 



Obovate, rather thin, nearly if not quite equilateral, more or 

 less compressed or but slightly convex, scarcely at all glossy, whit- 

 ish under a thin ashy epidermis, smooth ; ventral edge regularly 

 and greatly arcuated; the dorsal edges not much sloping, arched in 

 front^ and nearly straight behind ; anterior side rounded, posterior 

 subangulated ; beaks small, acute, and prominent; hgaraent rather 

 projecting ; fold and flexure obsolete; teeth very narrow. 



'' Its \ arieties in size, strength, and colour, are very great. In 

 muddy bays, they grow to a larger size, and are tliick and of a 

 blueish and, sometimes, a rusty colour, and covered mth a firm 

 dark epidermis. In clean sandy localities they are very thin, pure 

 white, or sometimes of a deHcate rose or lemon colom-, and the epi- 

 dermis very slight." — Gould. 



North America. 



187. Tellina inconspicua^ (pi. lix. f. 120.) Broderijj and 

 Sow., Zool. Jour. vol. 4. p. 363'; Zool. to Beech. Voy. t. 41. f. 6. 

 Hani. Des. Cat. p. 72. 

 T. testa SoKdulffi affini, sed impolita et epidermide fusco-cine- 



* A species which bears some resemblance to a young Inconspicua, 

 or Fusca, but wliich nevertheless is probably distinct, at least judging 

 from the figure, for I have never been able to procure a specunen of 

 the shell, is the 



Tellina petalum (pi. kvi. f. 263.) Valenxiennes in Zool. to 

 Humb. and Bonpl. Voy. vol. ii. p. 222. t. 48. f. 2. 



T. testa subovata, tenuiuscula, fragiU, subfequilaterah,^ compressins- 

 cula sublfevigata, supcrne subrosea, interne albido-lutea, zonis sub- 

 rosels pleruimiue ornata ; margine vcntrali satis convexo ; dorsali an- 

 tice convexo et subdeclivi, postice convexiusculo et dechvi; latere 

 antico rotuudato ; postico subangulato ; Hgaraento parvo, bren ; dcu- 

 tibus laterahbus nullis. 



Subovate, thimiish, fragile, nearly inequilateral, rather compressed, 

 nearly smooth, merelv marked with the strite of growth, somewhat rosy 

 near the beaks, becoming pale yellowish with rosaceous zones towards 

 the ventral edge, which is but moderately convex ; front dorsal edge 

 convex and not much sloping, hinder one but slightly convex and 

 decidedly sloping ; anterior extremity rounded ; posterior side suban- 

 gulated; ligament short and smaU ; teeth smaU, no lateral ones. 



Acupulco. 



Z A 



