CUNEOPSIS 945 
compressed pseudocardinal running parallel with the edge 
of the shell and an elevated, triangular, striate posterior one, 
with two straight laterals; right valve with a strong, elevated 
anterior pseudocardinal and a vestigial posterior one, and a 
somewhat double lateral, the pseudocardinals fitting into deep 
cavities in the hinge; muscle scars deep, the posterior ones 
oblique and elongated; beak cavities very deep, compressed ; 
nacre white, thinner behind. 
Length 86, height 44, diam. 31 mm. 
China. 
Unio capitatus Hrupr, Jl. de Conch., XXII, 1874, p. 114; 
Conch. -Eliuy. Nank., 1.1875, pl. 11, fig. s. 
Cuneapsis capitatus SIMPSON, Syn., 1900, p. 805. 
A remarkable shell, which is wedge-shaped whether viewed 
from the side or above. The anterior end is suddenly thick- 
ened and this part of the shell is much solider than the poste- 
rior part. In both of the specimens in the National Museum 
the hinder end is flexed to the left, that of the larger shell 
being decidedly so. ‘The two pseudocardinals are remarkably 
large and elevated, and are striate. The National Museum 
has fossil specimens of this species, which are considerably 
larger than the above measurements or those given by Heude. 
CUNEOPSIS HEUDEI (Heude). 
Shell elongate, ovate, inflated, solid, inequilateral; beaks 
rather high and full, their sculpture appearing to consist of 
strong, irregular ridges, which curve up decidedly behind; 
posterior ridge rather low, but pinched up into a sharp angle, 
nearly straight and close to the dorsal part of the shell, which 
is somewhat truncated; anterior end rounded; base line lightly 
curved, ending in a point about on the median line; surface 
with low, rather fine ridges, which follow the growth lines, 
sometimes having a few, faint, subradial ridges on the disk ; 
epidermis dark brown, silky; left valve with an anterior com- 
pressed pseudocardinal and a triangular, elevated posterior 
one, with two straight laterals; right valve with a high pseudo- 
cardinal and one lateral; the pseudocardinals and sockets rag- 
