294 



Closely allied to Timorensis, but differs in sliape^ sinuosity, and 

 the decided inequality of its sides. The anterior oblique striae, 

 which in some specimens extend along the ventral edge posterior- 

 ward, are rarely present in that species. 



Tranquebar ; Sumatra. 



138. Tellina TRIANGULARIS (pl.lx. f. 150.) C7«em??72, vol.vi. 

 p. 96. f. 85 ; Dillwyn, D. Cat. p. 79 ; Desh.ed.Lam. vol.vi. p. 209 ; 

 Telhnides triangularis, Hani. Des. Cat. p. 74. t. 4. f.33 ; TeUinides 

 politus Sow., Tanker. Cat. App. p. 4; T. trilatera, Gmel.; T. ob- 

 liqua. Lam. no. 47. 



T. testa ovato-trigona, insequilaterali, sohdiuscula, compressa, 

 nitidissima, sub epidermide flavescente-candida, antice et prope 

 marginem ventralem convexum concentrice striata, alteraque in 

 valvula striis flexuosis obhquis postice ornata; margine dorsaH 

 antice brevi et arcuato, postice subrecto et producto ; extremitate 

 postica obtuse acuminata; antica rotundata; ligamento promi- 

 nente ; flexura nulla ; dente lateraU approximatissimo. 



Ovate-triangular, tolerably solid, compressed, inequilateral, both 

 internally and externally white, the epidermis yellowish and very 

 glossy ; with concentric striae in front, and towards the convex 

 ventral margin which rises a little behind ; anterior side rounded, 

 its dorsal edge convex ; posterior side produced and obtusely acu- 

 minated, the dorsal edge nearly straight and very obhque; liga- 

 ment prominent ; flexure obsolete ; the lateral tooth quite close to 

 the beaks. 



Moluccas ? Mus. Cuming, &c. 



139. Tellina (Tellinides) acuminata (pl.lx. f.l41.) Han- 

 lei/, Des. Cat. p. 73. sup. t. 13. f. 53. 



T. testa elongata, subovata, sohdiuscula, valde insequilaterali et 

 insequivalvi, compressa, pohta, Isevigata, extus intusque albida aut 

 albido-aurantia ; margine ventrali subarcuato ; dorsali antice sub- 

 arcuato satisque declivi, postice elongato subrecto et declivi ; latere 

 antico breviore, rotuiidato ; postico valde producto, acuminato, ad 

 extremitatem rotundato ; ligamento infosso ; flexiu'a costac|ue um- 

 bonali obsoletis ; dente laterali approximate. 



Elongated, subovate, moderately strong, very inequilateral and 

 inequivalve, both valves compressed, but one much shallower than 

 the other ; smooth, polished, both within and without of a pale 

 orange becoming white towards the subarcuated ventral edge; 

 anterior side the shorter, rounded, its dorsal edge arched and 

 moderately sloping ; posterior side much produced, acuminated, 



