CYEENIDiE. 903 



This species is more inequilateral, more tumid near the umbones, and more regularly 

 sulcated than C. mulleriana. Prime {loc cit) from China, which, however, it also 

 closely resembles. • 



Type from Manwyne in Yunnan (4,000 feet) ; long. 39, lat. 33 mm. 



Yaylaymaw (all young), long. 21i, lat. 17, crass. Hi mm. 



CORBICULA ANDEESONIANA, NcviU. 



Corhicula andersoniana, Nevill, Joum. As. Soc, Bengal, vol. xlvi, 1877, p. 41. 



Eather small, thin, subequilateral, transversely ovate, tumid; medium-sized 

 specimens closely resemble in shape C. incsquilateraUs, Prime; both sides are obtusely 

 rounded, epidermis bright green, interior violet, paler near the margin. This is 

 quite distinct from the other Burmese and Indian species; it is, however, exceedingly 

 close to C. tumida, from Borneo, as figured by Issel,^ 



Type from Momien in Yunnan ; long. 20^, lat. 12 mm. 



1 Desh. : Proc. Zool. Soc, 1854. 



