t^^l

172 UXIOXID^.
postice declive truneata, margine ventrali recto. Umbonibtis
decorticatis. Epidermide flavescente, postice viridescente. Testa
concentrice striata et rugis plilritnis minutis valde approximantibus
angulariter seu fulgurate granuloso-crispata, postice tantiim radiatim
granuloso-crispata. Dentibus cardinalibus bifidis in utraque
valvo. Nacrea cserulescenti-albida, iridescente. In senioribus
granulationes valde inconspicusB fiunt.
Long. 25*5, lat. 39, diain. 18 mm.
Hah. Near Gowhatti, Assam.
The sculpture of this species much resembles that of jVodidaria
crispisulcata, Benson,
307. Parreysia (Parreysia) perconvexa, Preston.
Parreysia (Parreysia)perconvexa, Preston, Eec. Ind. Mus., Calcutta,
vij, 1912, p. 302.
Original description:—Shell ovate, slightly curved, very convex,
solid but much eroded, where intact covered by a dark blackish-
Fig. 17.—1 & 2. I'arrei/sia {P.) perconvexa, Preston. (Type,) Nat. size.
3. Hinge of same.
brown periostracum; umbones moderately large; dorsal margin,
sloping in an anterior direction ; ventral margin slightly curved