250 



remotioribus et clevatis ; margine ventrali convexo ; dorsali utrin- 

 quc convexo aut convexiusculo, antice subdeclivi, postice declivi ; 

 latere antico multo longiore ; natibus obtusis ; ligamento minimo, 

 promimdo ; lunula angustissiina ; costa umbonali nulla, flexura 

 subobsoleta ; dentibus lateralibus conspicuis, postico magis approx- 

 imato. 



Var. Ovata aut obovata, margine dorsali utrinque magis declivi. 



Oval, tliick, inequilateral, subventricose, glossy, wliitish, with 

 concentric striae, which in front are crowded and subimbricated, but 

 beliind are rather distant and elevated ; ventral edge convex ; dorsal 

 edges more or less convex, the hinder one sloping, the front one 

 but moderately so, anterior side much the longer, rounded (and 

 sometimes attenuated) at its extremity ; posterior extremity obtuse ; 

 ligament very small and rather prominent ; a very narrow lunule ; 

 beaks obtuse ; flexure nearly obsolete ; inside subnacreous ; lateral 

 teeth distinct, the hinder much the closer. 



Var. Ovate or obovate, the dorsal edges more sloping. 



Were it not for the shght fold, it might easily be mistaken for 

 a Donax. 



52. Tellina bimaculata (pi. Ivi. f. 16, 19, 20, 21, 22.) Lin., 

 Sys. 1120 ; Chem. vol. vi. f. 127, 132. DiUwyn. D. Cat. p. 101. 

 Encyc. Meth. t. 290. f. 9, 10. Donovan, Brit. Shells, t. 19. f. 1. 

 Turt. Biv. Brit.t. 8. f. 5 ; Lam. no. 52 ; Hani. Des. Cat. p. 71 . t. 4. 

 f. 83; T. sexradiata Layn. no. 53.; Haul. Des. Cat. p. 71. sup. 

 1. 11. f. 37. 



T. testa ovata aut ovato-rotundata, crassa, convexa, nitidiuscula, 

 la3vigata, variis coloribus picta ; margine ventrah convexo aut ar- 

 cuato (ssepe postice paululum subincurvato) ; dorsaK utrinque pau- 

 lulum convexiusculo, antice valde declivi, postice brevi leviterque 

 dechvi ; latere antico longiore, attenuate, ad extremitatem rotun- 

 dato ; postico brevi, obtuse biangulato ; costa umbonali et flexura 

 ventrah obsoletis ; hgamento brevi, prominente ; natibus acutis, 

 nymphis prominentibus, incumbentibus ; dentibus primariis per- 

 magnis; lateralibus brevibus, crassis, subsequidistantibus, (ple- 

 rumque obsoletis). 



Varying in shape from ovate to rounded ovate ; tliick, convex, 

 shghtly glossy, smooth ; ventral edge varying from convex to ar- 

 cuated, often shghtly incurved posteriorly ; hinder side much the 

 shorter, obtusely biangulated, its dorsal edge very short and but 

 shghtly sloping; anterior side much attenuated, its extremity 

 rounded, its dorsal edge much sloping and little convex, beaks in- 

 clined ; ligament short but very prominent ; primary teeth large. 



