214 CYRENID^E. 



which form the type series ; the dimensions of No. 4 are those 

 of the specimen figured by Hanley and Theobald in the Conch. 

 Ind. All four are now in the British Museum. 



1. 2. 3. 4. 



Long 32-25 30 33 25-75 mm. 



Lat 37 36 38-5 29 mm. 



Diam. . 10-25 20-5 12 16 mm. 



344. Cor bicula trigona, Desliayes. 



'Corbicula trigwia, Deshayes, P. Z. S. xxii, 1854, p. 344; Cat. 

 Brit. Mus., Conchif. p. 224 ; Prime, Ann. Lye. Nat. Hist. N.Y. 

 viii, 1866, p. 221, fig. 53; Cat. Corb. 1869-70, Gen. Cvrbiculn, 

 no. 102; H. & T., C. I. 1876, p. 62, pi. 15-5, fig. 7 ; Clessiu, in 

 Martini & Chemnitz, 1879, p. 203, no. 126. 



Original description : Testa trigona, aeqnilaterali, compressi- 

 uscula, antice paulo latiore et obtusiore, utroque latere asqualiter 

 declivi, transversim tenue et regulariter striata, epidermide viridi, 

 nitente induta, intus pallicle violacea ; umbonibus minimis, 

 brevibus acutis ; lunula ovata, angulo obsolete circumscripta, 

 pallida laevigata ; cardine angusto, bidentato, altero tridentato ; 

 dentibus lateralibus aequalibus, tenuissime striatis, antico leviter 

 arcuato. 



Hob. Pondicherry. 



The dimensions given below are taken from three specimens in 

 the type series in the British Museum : 



1. 2. 3. 



Long 11-25 10 1075 mm. 



Lat 12-75 11-75 12-25 mm. 



Diam 7 *3 7 mm. 



* Single valve. 



345. Corbicula striatella, DesTiayes. 



Corbicula striatella, Deshayes, P. Z. S. xxii, 1854, p. 344 ; Cat. 

 Brit. Mus., Conchif. p. 224 ; Hanley, Photog. Conch. ; Prime, 

 Ann. Lye. Nat. Hist. N.Y. viii, 1864, p. 74, fig. 22 ; H. & T., 

 C. I. 1876, p. 55, pi. 138, figs. 7 & 10; Clessin, in Martini & 

 Chemnitz, 1879, p. 167, no. 58, pi. 29, figs. 19 & 20, pi. 30, 

 fig. 20. 



Corbicula violacta, Prime, op. cit. 1861, p. 28, teste Prime ; 

 Proc. Acad. Nat. Sci. Philad. 1861, p. 128. 



Original description : Testa ovato-transversa, depressiuscula, 

 subaequilaterali, extremitatibus sequaliter obtusa. transversim 

 regulariter lirata, liris ad latus posticum evanescentibus, epi- 

 dermide pallide virescente, nitida vestita, intus atro-violacea ; 

 umbonibus brevibus, atro-violascentibus, pallidiore biradiatis ; 



