PARREYSI A 1 1 1 3 



figures and description of mandelayensis and I believe now 

 that it is a good species. The beaks and umbonal region are 

 verv high and placed well forward, they are strongly and 

 sometimes tubercularly sculptured : the whole shell is decidedly 

 triangular. 



Parreysia phrnodulosa Preston. 



"Shell small, ovate, dark brown ; both valves sculptured an- 

 teriorly with coarse, corrugate ridges, which become more nod- 

 ulous and irregular in the median and posterior regions; um- 

 bones rather large; dorsal margin rapidly sloping anteriorly, 

 slightly sloping posteriorly ; ventral margin somewhat round- 

 ed; anterior side rather contracted, sharply rounded; poste- 

 rior side broad, very gently rounded ; cardinal teeth very ante- 

 riorly situate, in the right valve squarish, bearing two elongate 

 grooves; in the left valve large, jagged, split into three por- 

 tions, between each of which occur two deep notches, the mid- 

 dle portion, or that between the two notches being by far the 

 smallest ; at the base of the anterior portion is situated a small- 

 er, jagged tooth, which is obliquely grooved in the centre; lat- 

 teral teeth in both valves posteriorly, elongately arched, groov- 

 ed down the whole length ; anterior scars very deep ; posterior 

 scars elongate, but not well marked : interior of shell pale blu- 

 ish, nacreous. 



Long. 15.5, lat. 20.5 mm." (Preston). 



Type locality. Zayleyman, Upper Burma. 

 Parreysia pernodulosa Preston, Rec. Ind. Mus., VII, 191 2, 



p. 300. 



Parrkysia feddeni (Theobald). 



Shell obovate. subsolid. subinHated, nearly equilateral ; beaks 

 full and high : anterior end considerably narrowed and round- 

 ed ; posterior end wide, almost evenly rounded, produced a 

 little behind the ligament and at the median line ; posterior 

 ridge well developed, narrowly rounded ; surface irregularly 

 marked with growth lines ; epidermis yellowish-green, with 

 indications of being banded, feebly rayed, shining ; teeth rather 

 delicate ; pseudocardinals subcompressed, ragged ; laterals 



