315 



honali conspicuis ; ligamento magno et satis prominente ; super- 

 ficie interna, Candida ; dentibus satis magnis. 



Ovate-oblong, solid, inequilateral, convex, dull, whitish, usually 

 covered by an ashy epidermis, nearly smooth, flexuous ; ventral 

 margin convex at the sides, but retuse in the middle ; anterior side 

 rounded, its dorsal edge convex and but little sloping; posterior 

 side wedge-shaped, its extremity nearly biangulated, its dorsal 

 margin elongated sloping and nearly straight; fold and flexure 

 conspicuous ; ligament tolerably large and prominent ; beaks ob- 

 tuse ; no lunule ; inside white, the teeth of a moderate size. 



California. 



183. Telltna edentula (pi. lxv. f. 243.) Brod. and Sow., 

 Zool. Jour. vol. iv. p. 363; Zool. to Beech. Voy. t. 41. f. 5. and 

 t.44. f.6; Hard. Des. Cat. p. 71. 



T. testa obovali-subtrigona, solidiuscuM, subventricosa, subim- 

 pohta, submsequilaterali, sordide albida, sublaevigata ; margine 

 ventrali convexiusculo ; dorsali utrinque subdeclivi, antice con- 

 vexo, postice subrecto ; latere antico paulo longiore, rotundato ; 

 postico obtuse subangulato; flexura costaque umbonali subobso- 

 letis ; ligamento magno, prominente ; dentibus minimis, sublamel- 

 losis. 



Var. Abbreviata et magis inaequilaterali. 



Oboval, subtriangular, tolerably strong, more or less ventricosc, 

 of a rather dull duty white, nearly smooth, more or less inequila- 

 teral; ventral edge moderately convex; dorsal not greatly sloping 

 on either side, convex in front, straightish and rather short be- 

 hind ; anterior side the longer, rounded at its extremity ; posterior 

 side obtusely subangulated ; fold and flexure rather obsolete ; liga- 

 ment large and prominent; inside white; teeth very small, and 

 usually sublamellar. 



Var. Shorter and more inequilateral. 



Behring's Straits. 



184. Tellina inornata (pi. lix. f. 123.) llanfoy, Zool. Proc. 

 1844. 



T. testa ovato-oblonga, subtenui, subventricosa, impolita, sub- 

 Eequilaterali, sordide albida, epidermide tcnui et cinerea induta, 

 lsevigata ; marginis ventralis parte media recta aut subretusa, ; dor- 

 sdis parte antica convexiuscula et paululmn decbvi, parte postica 

 subdeclivi ; extremitate antica rotundata, postica attenuato-rotun- 

 data ; flexura costaque umbonali obsoletis. 



Ovate-oblong, rather tliin, subventricose, and nearly equilateral, 



