224 BIVALVE SHELLS. 



11. CoRBicuLA Bengalensis. B.M. 

 C. testa ovato-subtrigona, depressiuscula, tenui, subaequilaterali, 



obsolete transversim striata, striis regularibus distantibus ; 

 epidermide flavescente nitidissima, intus alba, in medio macula 

 rubescente notata ; umbonibus minimis acutis; cardine angusto 

 tridentato, altero bidentato ; dentibus lateralibus angustissimis, 

 arg-ute striatis. 

 ('orbicula Bengalensis, Desh. Proc. Zool. Soc. 1854. 

 Ilub. In rivulis Bengalensibus. Coll. Cuming. 



12. CORBICULA striatella. B.M. 



C. testa ovato-transversa, depressiuscula, subsequilaterali, extre- 

 mitatibus fcqualiter obtusa, transversim regulariter lirata, liris 

 ad latus posticum evanescentibus ; epidermide pallide virides- 

 cente, nitente vestita ; intus atro-violacea; umbonibus brevibus, 

 atro-violascentibus, pallidiore biradiatis ; cardine angusto, tri- 

 dentato ; dentibus inaequalibus, divaricatis, postico longiore et 

 angustiore, dentibus lateralibus elongatis, angustis, subaequali- 

 bus, arcuatis, tenuissime striatis. 



Corbicula striatella, Desh. Proc. Zool. Soc. 1854. 

 Hab. Pondicherry. Coll. Cuming. 



13. Corbicula trigona. 



C. testa trigona, a^qmlaterali, compressiuscula, antice paulo la- 

 tiore et obtusiore, utroque latere a^qualiter declivi, transversim 

 tenue et regulariter striata ; epidermide viridi, nitente induta, 

 intus pallide violacea ; umbonibus minimis, brevibus, acutis ; 

 lunula ovata, angulo obsoleto circumscripta, pallida, Isevigata ; 

 cardine angusto, altero bidentato altero tridentato ; dentibus 

 lateralibus sequalibus, tenuissime striatis, antico leviter arcuato. 



Corbicula trigona, Desh. Proc. Zool. Soc. 1854. 

 Hab. Pondicherry. Coll. Cuming. 



14 Corbicula Cashmiriensis. 



C. testa ovato-transversa, subtrigona, aequilaterali, tumidula, 

 transversim tenue et regulariter striata, striis postice evanes- 

 centibus ; epiderraide nitida, atro-virescente, in latere postico 

 tenuissime striato vestita ; umbonibus tumidis, prominentibus, 

 ])rofunde erosis, violaceis ; cardine angusto, in valva dextra bi- 

 dentato, in altera tridentato, valvula dextrse dente antico late- 

 rah adnato ; dentibus primariis divergentibus, simplicibus, 

 lateralibus, longis, angustis, antico longiore cardine proximo ; 

 valvis intus violaceis, impressione pallii margine valde remoto. 



Corbicula Cashmiriensis, Desh. Proc. Zool. Soc. 1854. 

 Hab. Cashmire. Coll. Cuming. 



