COBBICULA. 211 



Shell subtrigonal or cordiform, subequilateral ; with umbones 

 prominent, concentrically grooved ; hinge bearing three divergent 

 cardinal teeth in each valve ; lateral teeth elongated, compressed, 

 lamelliform, finely striate ; right valve having two lateral teeth 

 both anteriorly and posteriorly, the left valve having but one on 

 each side ; pallial line usually continuous. 



Animal having the edge of the mantle ornamented with small 

 conical tentacles ; siphons very short, closely situate ; orifices 

 papillary ; foot tongue-shaped, rather large, laterally compressed ; 

 palpes triangular, large ; gills joined behind. 



337. Corbicula fluminalis (Muller). 



Tellina fluminalis, Mull. Verm, ii, p. 205. 



Venus jluminalis, Chemn. iii Conch.-Cab. vi, p. 319, pi. 30, fi?. 320 ; 



Wood, Ind. Test. pi. 8, fig. 113. 

 Tellina Jluminalis, Schroter, Flussconch. p. 195, no. 20 ; Gmel. 



S. N. p. .3242, no. 79. 



Cy das fluminalis, Blainv. D. S. N. xii, p. 280. 

 Cyrena fuscata, var.?, Lamk. An. s. Vert, v, p. 522, no. 4. 

 Corbicvla fluminalis, Deshayes, Cat. Brit. Mus., Conchif. 1854, 



pp. 222-22:1 



Original description: Testa crassa, dura valde gibba, opaca, 

 antice versus cardinem latior, quam postice, extus viridis crebro 

 striatim. imbricata ; striae aperturae parallel*. Intus cyanea ; 

 cardiuis dentes inedii sex cum fossulis, tres nempe in quavis 

 valvula, utriusque ligamento proximus emarginatus est ; laterales 

 utrinque elongati, sulcique excipientes, crenulati sunt. 

 Hob. India, etc. 



The following dimensions are those of two specimens in the 

 British Museum : 



1. 2. 



Long 39-25 38 mm. 



Lat 45 43'25 mm. 



Diarn 26 23*5 mm. 



Var. holstiana, Schlesch, Calcutta, Eec. Ind. Mus. ii, 1908, 

 p. 308. 



Said to be more arched than the typical form. 

 Hab. Hoti-Mardan, near Peshawar. 



338. Corbicula fluminea (Mutter). 



Tellina jluminea, Miill. Verm, ii. p. 206; Gmel. S. N. p. 3243, 



no. 80. 



Cyclas jluminea, Blainv. D. S. N. xii, p. 280. 

 Venusflumima, Chemn. in Conch.-Cab. vi, p. 320, pi. 30, figs. 322, 



323, an eadem species ? ; Schroter, Einl. iii, p. 159, no. 13 ; 



Wood, Ind. Test. pi. 8, fig. 114. 

 Tellina fluviatilis, Schroter, Flussconch. p. 193, pi. 4, figs. 2 & b. 



