﻿SOLI; N MA 459 



a species of Southeastern Asia. It was described with a mis- 

 cellaneous lot of shells from various places and has probably 

 been credited to the wrong region. 



Group of Solcnaia solciiifuniiis. 



Shell only slightly narrowed in front, the narrow area not 

 distinctly marked off from the rest of the shell. 



Sui,l;NAlA SOLliNlFUKMlS (iJeUSOn). 



Shell elongated, rather solid, narrower and rounded in front, 

 subcompressed, inequilateral; gaping at the anterior base; 

 beaks rather full ; posterior ridge low, ending behind in a point 

 at the base of the shell ; surface with uneven, concentric sculp- 

 ture, the median area nearly smooth; epidermis green to 

 blackish; above the posterior ridge there is a shallow, radial 

 furrow; posterior end obliquely truncated; hinge with ves- 

 tiges of pseudocardinals ; left valve with two faint laterals; 

 right valve with one ; nacre dirty purplish. 



Length i6o, height 42, diam. 18 mm. 



Assam, India. 

 Anodonta solcniformis BiiNSON, Jl. As. Soc. Bengal, \ , 1836, 



p. 749. 

 Spat ha soknifonnis Han ley and Thkop.am), Conch. Ind., 



1876, p. 5, pi. IX, fig. I. 

 Mycetopiis solenifoniiis Fischer, Jl. de Conch.. XXX\ III. 



'1890. p. 94- 

 Solcnaia solcmfonnis Simpson, Syn., 1900, i). 050. 

 Mari:,aron (Uiiio) bensoni Lea, Syn., 1870. p. 57. 

 Mycetopns bensonianus P.crEL, Conch. Sam., Ill, 1890, p. 186. 



This species has vestigial teeth so well developed that Lea 

 placed it in the genus Un'w. It differs from oleivora, to which 

 it is nearly allied, in having a feeble, radial groove on the dor- 

 sal slope, and in not having the anterior area distinctly marke<l 

 out. There is a posterior sinus marked quite distinctly. 



SoLENAiA OLEivoRA (Heude). 



Shell much elongated, narrower in front, inequilateral, sub- 

 compressed, gaping all along the front half of the base and 

 behind , beaks low ; posterior ridge elevated and angular, end- 



