158 UNIONIDy^. 



Hah. Wynegun^a River, 30 miles east of Nagpoor, in the 

 Deccan, Bengal (C. M. Wheatlei/). 



The following localities are attached to specimens in the Indian 

 Museum Collection : — Damuda ( W. T. Blanfonl) ; Surat ; Sambal- 

 pur ; Godavery Eiver ( W. T. Blanfonl) ; Barod, about 130 miles 

 S.W. of Sepree. 



The dimensions of three average specimens are as follows : — 

 No. 1 being those of the specimen figured by Hanley in the 

 ' Conchologia Indica,' and now in the British Museum Collection. 



292. Parreysia (Parreysia) favidens (Benson). 



Parret/sia {Parreysia) favidens (Beuson) ; Simpson, Wasliington, 



D.C., Smiths, lust., Nat. Mus. Proc. xxii, 1900, pp. 842-843. 

 ? Mija spuria, Wood, Ind. Test. 1825, p. 12, pi. 2, lio-. 35 a. 

 Unio favidens, Benson, A.M.N.H. x, 1862, p. 188 ; J. A. S. B. xxxv, 



1867, p. 138; H. & T., 0. I. 1876, p. 6, pi. 11, fig. 1; Beeve, 



Conch, Icon, xvi, 1865, pi. 'IQ, fig. 131 ; Pnetel, Conch. Sam. iii, 



1890, p. 152. 

 Margaron (Uniu) favidens, Lea, Syn. 1870, p. 38. 

 Uniojlavidens, Psetel, Conch. Sam. iii, 1890, p. 152. 

 Unio trirostris, Musgrave, Hanley, Phot. Conch. 1803, pi. 2, fig. 9; 



11. & T., C. I. 1876, p. 6, pi. 11, fig. 6; Pc-etel, Conch. Sam. iii, 



1890, p. 170. 

 Unio tri2)artitns, Lea, Proc. Acad. Nat. Sci. Philadelphia, vii, 



1863, p. 190; Journ. Acad. Nat. Sci. Philadelphia, vi, 1866, 



p. 57, pi. 1!>, fig. 55; Lea, Obs. Genus Unio, xi, 1867, p. 61, 



pi. 1!), fig. 55. 

 Marijaron {Unio) tripartittis, Lea, Syn. 1870, p. 35. 

 Unio smaragdiies, Benson, A. M. N. H. x. 1862, p. 190 ; Blanford, 



J. A. S. B. xxxv, 1806, p. 147 ; H. & T., C. I. 1876, p. 5, pi. 10, 



fig. 5 ; Pietel, Conch. Sam. iii, 1890, p. 167. 



Original description : — Testa transverse ovata, inaequilaterali, 

 crassa, subtumida, antice rotundata, posiice subalata, declivi, 

 an<^ulata, demum obtusa, margine ventrali convexiusculo ; disco 

 inaequaliter sulcato ; epidermide obvaceo-fusca, versus marginem 

 ventralem luteo-olivacea, postice viridi parce fasciata ; umbonibus 

 tumidis, proininentibus, decorticatis, siilcis radiatis angulato- 

 flexuosis indutis; lunula impressa, elliptica, decorticata ; liga- 

 mento elongato ; carina umbonali lajviuscula, linea unica vix 

 elevata notata ; dentibus cardinabbus crassis, fortiter radiato- 

 rugosis, lateralibus obliquis, elongatiusculis, valvoe dextrse duplic- 

 ibus, sinistra^ subtriplicibus ; margarita pallide lutea iridescente. 



Long. 45, lat. 60, diam. 30 mm. 



Hah. Upper Ganges. 



