270 



shaped, its dorsal edge straight (or subretuse) and much sloping; 

 beaks prominent, acute; ligament sunken; mnbonal ridge very- 

 distinct; inside white; laterak teeth distinct, the hinder sHghtly 

 the more distant. 

 Ceylon. 



88. Tellina plicata (pi. Ixii. f. 191.) Valenciennes, Enc. 

 Meth. t. 287. f. 3. 



T. testa obovali, tenuiuscula, subventricosa, tortuosa, gequilate- 

 rali, impoHta, intus extusque Candida, striis elevatis lamellosis con- 

 centrice ornata; margine ventrali arcuato, postice sui'sum acch- 

 nato; dorsaU utrinque paululmn declivi, antice convexo (sed 

 juxta lunulam brevem distinctam incurvato), postice convexiusculo 

 et elevatiore; extremitate antica rotundata, obtuse biangulata; 

 costa umbonaH sul)carinata flexuraque ventrali conspicuis ; liga- 

 mento longo, infosso; dentibus laterahbus parvis, antico subap- 

 proximato. 



Oboval, rather thin, somewhat ventricose, tortuous, nearly equi- 

 lateral, dull white, with regular raised and moderately distant con- 

 centric sublamellar strise ; the ventral margin arcuated, and rising 

 behind; anterior side very sHghtly the longer, its extremity 

 rounded, its dorsal edge near the short but distinct Innule in- 

 curved and scarcely sloping ; extremity of the posterior side ob- 

 tusely biangulated, its dorsal slope the more elevated shghtly 

 convex and moderately sloping ; ligament elongated and sunken ; 

 umbonal ridge subcarinated, and as well as the ventral fold, very 

 distinct ; inside wliite ; lateral teeth small, the anterior the more 

 approximate. 



Hab, ? Mus. Cuming, Metcalfe. 



89. Tellina crystallina (pi. Ivii. f. 43.) Chem. vol. 11. 

 p. 210. f. 1947, 1948 ; Hani Des. Cat. p. 66. t. 3. f. 10 ; Wood, 

 Gen. Conch, p. 149. 



T. testa obovata, tenui, insequivalvi, insequilaterali, convexius- 

 cula, nitida, submargaritacea, Candida, subpellucida, lamellis sub- 

 remotis concentricis undique ornata; interstitiisloevibiis; margine 

 ventrali valde arcuato, postice brevi et incurvato; latere antico 

 longiore, rotmidato ; postico brevi, rostrato ; natibus acutis ; liga- 

 mento minimo, infosso ; costa umbonaU distincta ; dentibus latera- 

 libus distinctis, subseqiiidistantibus. 



Obovate, thin, inequivalve, inequilateral, moderately convex, 

 glossy, pure wliite, subnacreous, with distant regular raised con- 

 centric striae, the interstices quite smooth ; ventral edge greatly 



