315 



bonali conspicuis ; Ugaraento magno et satis prominente ; super- 



ficie interna candicla ; dcntibiis 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 wliite, the teeth of a moderate size. 



California. 



183. Tellina edentula (pi. Ixv. f. 243.) Brocl and Soic, 

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

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



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

 poHta, subinsequilaterali, sordide albida, subleevigata ; margine 

 ventrali convexiusculo ; dorsaH utrinque subdeclivi, antice con- 

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

 postico obtuse subangidato ; flexura costaque umbonali subobso- 

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

 losis. 



Var. Abbreviata et magis infequilaterali. 



Oboval, subtriangidar, tolerably strong, more or less ventricose, 

 of a rather duU dirty 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- 

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

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

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

 usually sublameUar. 



Var. Shorter and more inequilateral. 



Behring's Straits. 



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

 1844. 



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

 sequilaterah, sordide albida, epidermide tenui et cinerea induta, 

 laevigata ; marginis ventralis parte media recta aut subretusa ; dor- 

 salis parte antica fconvexiuscula et paululum decHvi, parte postica 

 subdeclivi ; extremitate antica rotimdata, postica attenuato-rotun- 

 data ; flexura costaque umbonaH obsoletis. 



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



