208 



Shell roundedly ovate or subtrigonal, solid, thick, dorsal margin, 

 bearing on each valve three divergent cardinal teeth ; lateral teeth 

 curved, elongated, striate, unequal, shorter in front than behind, 

 double on the right valve ; ligament large, projecting, thick ; 

 pallial impression simple or subsinuous. 



Animal having two short siphons, united at their base ; mantle 

 lobes simple or fringed. 



332. Batissa inflata, Prime. 



Batissa influta, Prime, P. Z. S. xxviii, 1860, p. 320 ; Cat. Corbi- 

 culidse, 1869-70, p. 139; Sowerby, Conch. Icon, xx, 1878, 

 pi. 4, sp. 10; Clessin, in Martini & Chemnitz, 1879, pp. 218- 



Original description : Testa magna, orbiculari, inaequilaterali, 

 crassa, solida, obtusa, epidermide rugosa, fusco-nigrescente vestita ; 

 umbonibus productis, erosis obliquis ; valvis intus albis et violaceis ; 

 dentibus cardinalibus crassis, subaequalibus ; lateralibus angustis. 



Long. 83, lat. 96, diam. 57 mm. 



Nab. Nicobar Islands. 



333. Batissa similis, Prime. 



Batissa similis, Prime, Ann. Lye. Nat. Hist., N.Y. vii, 1859, 

 p. 112; viii, 1866, p. 229, fig. 60 ; Cat. Corbiculidre, 1863, p. 5 ; 

 1869-70, p. 140, no. 25; Clessin, in Martini & Chemnitz, 1879, 

 p. 213, pi. 36, fig. 3. 



Original desertion: Testa ovato-orbiculari, oblique inaequi- 

 laterali, tumida, solida, depressa, intus superne alba, postice 

 inferneque violacea, epidermide nigra vestita, sulcis remotis, 

 umbonibus profunde erosis ; dentibus cardinalibus tribus, sub- 

 aequalibus, caniculatis ; lateralibus elongatis, angustis, subaequal- 

 ibus, serrulatis. 



Long. 53, lat. 79, diam. 34-5 mm. 



Hob. Nicobar Islands. 



334. Batissa capillata, Preston. 



Batissa capillata, Preston, Rec. Ind, Mus., Calcutta, ii. 1908, p. 207. 

 pi. 16, fig. 39. 



Original description-. Shell subtrigonal, inequilateral, thick, 

 rather inflated, covered with a dark, brownish-black periostracum 

 except in the umbonal region where erosion has taken place, 

 sculptured with coarse, irregular, concentric growth-lines which 

 are obliquely crossed posteriorly with coarse hair-like ridges ; 

 anterior side somewhat angularly rounded ; posterior side slightly 

 produced, obscurely angled ; ventral margin rounded ; ligament 

 large, prominent ; cardinal teeth broad and very coarse ; anterior 

 lateral teeth elongated, finely striate ; interior of shell purplish- 

 white, the purple staining deepening posteriorly. 



Long. 74, lat. 72 mm. 



Hob. Andaman Islands (Warneford). 



