247 



cuis; ligamento minimo, infosso ; superfine interna polita; den- 

 tibus lateralibus distinctis, subapproximatis, subsequidistantibus. 



Small, ovate, subtrigonal, nearly equilateral but rather longer 

 posteriorly, rather ventricose in front but compressed at the pos- 

 terior end, tolerably thick, of a very glossy pure uniform white, 

 with scarcely impressed concentric stria? ; the ventral edge bulging 

 out towards the rounder anterior extremity, but rising in rather a 

 concave line towards the posterior end, which is strongly beaked 

 and has the tips rounded but much attenuated ; front dorsal edge 

 convex and strongly sloping, hgamental edge elongated, nearly 

 straight and strongly sloping ; beaks prominent ; umbonal ridge 

 and fold not conspicuous ; ligament sunken and minute ; inside 

 polished, the lateral teeth distinct and nearly equally subap- 

 proximate. 



Catbalonga, Isle of Samar. 



47. Tellina Sowerbii (pi. lxiii. f. 205.) Hcmley, Zool. Proc. 

 1844. 



T. testa subelliptica, subaequivalvi, tenui, compressa, laevigata, 

 polita, Candida; margine ventrali arcuato, postice sursum accli- 

 nato; dorsab antice vix paululum declivi, convexiusculo, postice 

 paululum declivi et prope nates subincurvato, deinde convexo ; 

 latere antico longiore, subproducto ; postico rotundato-acuminato ; 

 ligamento parvo, angustissimo, infosso ; iiexura ventrah costaque 

 umbonab subinconspicuis ; superficie interna albida, plerumque 

 aurantio tincta ; dentibus lateralibus tenuibus, subaequidistantibus. 



Nearly elliptical, subinequivalve, compressed, higldy polished, 

 of an uniform smooth white (in some specimens with a tinge of 

 rosy orange which increases in intensity towards the beaks) ; ven- 

 tral edge arcuated, and rising at the posterior extremity ; anterior 

 side decidedly the longer, its extremity rounded, its dorsal edge 

 nearly horizontal; posterior side attenuated, but rounded at its 

 termination, its dorsal edge a little sloping at first, slightly incurved 

 near the beaks, and then decidedly convex ; ligament sunken, and 

 very narrow ; inside usually tinged with orange ; lateral teeth thin, 

 and nearly equidistant. 



Australia. 



48. Tellina lata (pi. briv. f. 237.) Quay et Gal. Astrol. 

 Zool. vol. 3. p. 497. t. 81. f. S, 9, 10 ; Lam. 2nd. ed. vol.6, p. 108 ; 

 Haid. Des. Cat. p. 71. sup. t, 14. f. 13. 



T. testa subovali, insequilaterali, solida, subsequivahd, compres- 

 siuscula, nitida, alba, sublsevigata, rubro eleganter radiata; radiis 



p 2 



