172 



uyioxiD^. 



postice declive truncata, margine ventrali recto. Umbonibus 

 decorticatis. Epidennide flavescente, postice viridescente. Testa 

 coucentrice striata et rugis pluriinis minutis valde approximantibus 

 angulariter seu fulgurate granuloso-crispata, postice tantiim radi- 

 atim granuloso-crispata. Deiitibus cardinalibus bifidis in utraque 

 valvo. Nacrea cserulescenti-albida, iridescente. In senioribus 

 granulationes valde inconspicuae fiunt. 



Long. 25*5, lat. 39, diam. IS mm. 



Hab. Near Gowhatti, Assam. 



Tbe sculpture of this species much resembles that of Xodidaria 

 crispisulcata, Benson. 



307. Parreysia (Parreysia) perconvexa, Preston. 



Parreysia (ParreJ/sia) jierconvexa, Preston, Eec. lud. Mus., Calcutta, 

 vii, 1912, p. 302. 



Original description : — Shell ovate, slightly curved, very convex, 

 solid but much eroded, \\here intact covered by a dark blackish- 



Fig. 17. — 1 & 2. Parrfj/sia {P.) perconvexa, Preston. (Type.) Nat. size. 

 o. Hiiiffe of same. 



bro\\"n periostracum ; umbones moderately large ; dorsal margin 

 sloping in an anterior direction ; ventral margin slightly curved 



