I 122 PARRi:VSIA 



Parreysia annandalei Preston. 



"Shell oval, convex, moderately solid, coarsely, concentrical- 

 ly ribbed, covered with a thin, smooth, brownish-olivaceous 

 periostracuni ; umbones rather small, not prominent; dorsal 

 marg;in arched : ventral mar2;in considerably rounded ; anterior 

 side sli.^htly produced and rather sharply rounded ; posterior 

 side very bluntly subrostrate ; cardinal teeth two in each valve, 

 somewhat anteriorly situate, rather coarse, corrugated ; lateral 

 teeth strong, curved : anterior scars rather small, very deeply 

 excavated; posterior scars also small, ovate, deeply impressed; 

 interior of shell whitish, iridescent. 



Long. 29, lat. 41, diam. 20 mm." (Preston). 



Type locality, Gowhatty. 

 Parreysin annandalci Prkston, Rec. Ind. Mus., VII, 1912, p. 



302. 



Parrf.ysta pkrconvexa Preston. 



"Shell ovate, slightly curved, very convex, solid, but much 

 eroded, where intact covered with a dark, blackish brown 

 periostracum ; umbones moderately large ; dorsal margin slop- 

 ing in an anterior direction ; ventral margin slightly curved 

 posteriorly ; anterior side genth- rounded ; posterior side slight- 

 ly and very bluntly produced, rounded ; cardinal teeth very 

 anteriorly situate, with upper surface multi-ridged and sup- 

 ported in each valve by an enormous columm-like callus thick- 

 ening of the shell ; lateral teeth coarse, rather short, curved ; 

 anterior muscular scars of great depth ; posterior scars sub- 

 circular, well impressed ; interior of shell very pale, greenish- 

 white. 



Long. 37. lat. 55, diam. 33 mm." (Preston). 



Type locality. Nangyong Lake. 

 Farreysia pcrcom'cxa Preston, Rec. Ind. Mus., VII, 1912, 



p. 302. 



Parreysia MvOdest.\ (Heude). 



Shell solid, su1)inflated. somewhat elongated and irregularly 

 obovate or subrhomboid. inequilateral ; beaks apparently not 

 elevated ; ]iosterior ridge feeblv developed, slightly double ; 



