250 



remotioribus et elevatis ; margine ventrali convcxo ; dorsali utriu- 

 quc convexo aut convcxiusciilo, antice subdeclivi, postice declivi; 

 latere antico multo longiore ; natibus obtusis ; bgamento miiiimo, 

 prominulo ; lunula angustissima ; costa umbouaU nvlUi, flexurii 

 subobsoleta ; deutibus lateralibus conspicuis^ postico magis approx- 

 imato. 



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



Oval, thick, inequilateral, subventricose, glossy, whitish, 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 slight 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. DillwjTi. 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 I/am. no. 53.; Hani. Des. Cat. p. 71. sup. 

 1. 11. f. 37. 



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

 laevigata, variis coloribus picta; margine ventrali convexo aut ar- 

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

 lulum convexiusculo, antice valde declivi, postice brevi leviterque 

 dechvi ; latere antico longiore, attenuato, ad extremitatera rotun- 

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

 ventrali obsoletis ; bgamento brevi, prominente ; natibus acutis, 

 nympliis prominentibus, incumbentibus ; deutibus primariis per- 

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

 rumque obsoletis). 



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

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

 cuated, often slightly incurved posteriorly ; hinder side much the 

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

 slightly 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. 



