216 CYKENID^E. 



regulariter auguste sulcata ; antice panllulum acuminata, postiee 

 eubtruncata : umbonibus inflatis, valde prominentibus, erosis ; 

 margine dorsali fere angulato, niarg. antico rotundato, marg. 

 postico rotundato, marg. ventraii valde convexo ; ligamentum 

 curtum, solidum, lunula triaugulata ; cardine valde incrassato ; 

 dentibus cardinalibus crassis ; dent, lateral, paulluluin arcuatis, 

 subsequalibus ; margarita saturate violacea. 



Long. 12, lat. 11-5, diam. 10 mm. 



Hob. Ceylon. 



Type in the British Museum. 



349. Corbicula nevilli, Clessin. 



Corbicnla nevilli, Clessin, Mai. Blatt. ix, n. f . 1887, pp. 70-71, pi. 2, 

 fig. 5. 



Original description : Testa parvula, modice solidula, ovato- 

 rotundata, nitidula, sulcis distantibus ornata, epidermide flaves- 

 cente ; antice vix subacuminata, rotundata ; postiee subtruncata, 

 umbonibus paullulum elevatis, erosis ; margine dorsali valde 

 arcuato, marg. antico rotundato, m. postiee rotundato, m. inferioir 

 convexo ; ligamentum crassium ; lunula profunda ; cardine in- 

 crassato ; dentibus cardinalibus tenuibus ; dent, later, sub- 

 sequalibus, subarcuatis ; margarita violacea, sub umbo. pallida. 



Long. 12, lat. 14-5, diam. 9 mm. 



Nab. Assam. 



350. Corbicula occidens, Deshayes. 



Corbicnla occidens, Deshayes, Cat. Brit. Mus. Conchif. 1854, p, 223 ; 

 Prime, Ann. Lye. Nat. Hist. N.Y. viii, 1866, p. 220, fig. 51 ; 

 H. & T., C. I. p. 55, pi. 138, figs. 8, 9. 



Original description: Testa ovato-transversa, aequilaterali, 

 tumida, tenui, transversim regulariter lirato-sulcata ; epidermide 

 flavescente-viridi vestita, ad umbones atro-violascente vel breviter 

 albo radiata ; umbonibus tumidis, brevibus, laevigatis ; lunula 

 ovato-lanceolata, pallida, Isevigata ; valvis intus profunde fusco- 

 violascentibus ; cardine angusto, inaequaliter tridentato ; dentibus 

 lateraiibus brevibus augustis albis tenue striatis. 

 Hab. 8ikkim ; Moradabad, Bengal. 



The dimensions given below are taken from three specimens in 

 the British Museum : 



1. 2. 3. 



Long.. 13-25 11-25 12-25 mm. 



Lat 16 13-25 15 mm. 



Diam 8 7 7*75 mm. 



351. Corbicula iravadica, Blanford. 



Corbicula iravadica, Blanford, J. A. S. B. xlix, 1880, pp. 221-222 ; 

 II. & T., C. I. 1876, p. 62, pi. 115, fig. 8. 



