PAERETSIA. 165 



rounded ; anterior side rather contracted, sharply rounded ; 

 posterior side broad, very gently rounded ; cardinal teeth A^ery 

 anteriorly situate, in right valve squarish, bearing two elongate 

 grooves, in left valve large, jagged, split into three portions, be- 

 tween each of which occur two deep notches, the middle portion, 

 or that between the two notches, being by far the smallest, at the 

 base of the anterior portion is situated a smaller, jagged tooth, 

 which is obliquely grooved in the centre ; lateral teeth in both 

 valves posteriorly, elongately arched, grooved down the whole 

 length ; anterior scars very deep ; posterior scar elongate, but not 

 well marked ; interior of shell pale bluish, nacreous. 



Long. 15'5, lat. 20*5 mm. 



Hah. Zayleyman, Upper Burma {Dr. J. Anderson). 



Type in the Indian Museum Collection. 



296. Parreysia (Parreysia) feddeni {Theobald). 



Parrei/sia (Parreysia) feddeni (Tlieobald) : Simpson, Washington, 

 D.C.. Smiths lust., Nat. Miis. Proe. xxii. 1900, p. 843. 



Unio feddeni. Theobald, J. A. S. B. xlii, 1874, p. i>08, pi. 17, 

 fig. a 



Original descriiition : — "Testa quadrato-ovali, concentrice sul- 

 cata, antice gibbose rotundata, postice dilatata, subtruncata ; 

 parum ina^quilaterali. Umbonibus decorticatis baud promi- 

 nentibus. Epidermide laevi, subpolita, viridescenti-flava. Den- 

 tibus cardinalibus lamelliformibus, striatis ; in valva dextra singulo, 

 serrato, in sinistra geminis triangularibus, striatis et serratis. 

 Nacrea cserulescenti-albida. 



Long. 29-5, lat. 40, diam. 19 mm. 



Ilab. Peemgunga, Central India {F. Fedden) ; there are speci- 

 mens also in the British Museum and in the Indian Museum 

 from the same locality, the latter collected by the late Dr. W. T. 

 Blanford. 



297. Parreysia (Parreysia) daccaensis, Preston. 



Parreysia {Parrei/sia) daccaensis, Preston, Kec. Ind. INIus., Calcutta, 

 vii, 1912, p. 800. 



Orir/inal desicyq^tion : — Shell differing from P. feddeni, Theobald, 

 in its larger size, more ponderous form and more elongately ovate 

 shape, it is much darker in colour, 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 the hinge-teeth is the same. 



Long. 47, lat. 76*o, diam. 29 nun. 



Hab. Dacca. 



The type specimen is in the Indian Museum. 



