I I 14 PAP.RKYSIA 



curved, wide, two in the left valve, the lowec wider, and one 

 in the right ; muscle scars rather shallow ; nacre bluish-white, 

 not shining. 



Length 26, height 17, diam. 11 mm. 



Penugunga River, Central India. 

 Unio fcddrni Theodald, Jl. As. Soc. Beng., XLII, 1874, p. 



208, pi. x\ II, fig. 3. 

 Parrcysia fcddcni Siimpson. Syn., 1900, p. 843. 



The original figure and description of this species are not 

 accessible as I write this description, but a specimen is before 

 me from the Morelet collection bearing the name Unio feddeni 

 Theobald, from Yunnan. It has the appearance of being 

 young. It is remarkable for its obovate form, being almost 

 evenly rounded behind, and for having ver}^ wide laterals and 

 subcompressed pseudocardinals. It was compared with the 

 figure and description of feddeni and agrees fairly well with 

 them. 



Parrfa'sia daccaensi.s Preston. 



"Shell differing from P. feddeni Theobald, in its much 

 larger size, more ponderous form, and more elongately ovate 

 shape, it is much darker in color, being of a dark, blackish- 

 brown instead of the greenish-yellow shade of that species, the 

 shell is much more coarsely, concentrically striate and is also 

 considerably malleated, while P. feddeni is almost smooth in 

 texture ; the umbones in the present species are, though larger, 

 far less prominent, but the system of hinge teeth is the same. 



Long. 47, lat. 76.5, diam. 2() mm." (Preston). 



Type locality, Dacca. 

 Parreysia daccaensis Preston, Rec. Ind. Mus., VII, 1912, p. 



300. 



Parreysia tavoyensis (Gould). 



Shell subtriangular, sometimes sub-obovate, subinflated, sub- 

 solid to moderately solid, slightly inequilateral ; beaks high and 

 full, strongly sculptured with zigzag-radial bars, this sculpture 

 often extending over the whole disk of the shell ; sometimes 

 it is almost wanting- and the surface is concentrically furrowed; 



