366 ; TESTACEOUS MOLLUSGA. 
Ff. 96.— Midd. Mal. R. 3, p. 31.  Transversely oboval, subinequi- 
lateral, rounded at both ends, gaping in front, thin, ventricose, 
ochraceous-white, usually with pale livid bands, radiated with deeper- 
tinted flattened narrow numerous and smoothish ribs, their intervals 
nearly as broad; ventral edge arcuated, rising at both ends, par- 
ticularly in front; umbones oblique; an obscure cordate lunular im- 
pression with pouting edges: inside rufous and livid purple; only a 
single distinct cardinal tooth in each valve, lateral teeth wholly 
obsolete. %...1g. Caspian Sea. The surface has most minute con- 
centric wrinkles. 
CaRDIUM PARVUM (t. 17, f. 39, as C. punctatum), Phil. Sic. 2, 
p. 89, t. 14, 7.17. Shape and sculpture of C. H@eiguam, but rather 
more transverse, and less angular posteriorly, with the prominent 
square-cut central ribs and their finely wrinkled intervals of equal 
breadth. Colour brown or smoke-black, variegated with whitish, 
especially on the umbones, and often speckled or subarticulated with 
a similar hue on one or two of the anterior costee. +4...3. Sicily, in 
Lake Fusaro. The specimen figured was received from Philippi as 
“C. punctatum of Renieri” (undescribed); two others subsequently 
sent by him as “ C. parvum” proved identical. 
CaRDIUM scABRUM (t. 17, f. 43), Phil. Sic. 2, p. 38, t. 14, f. 16. 
This species proves identical with the C. nodosum of Turton, from 
whose figure our own was copied. 
CaRDIUM HysTRIx (t. 17, f. 46), Reeve, Z. P. 1844, p. 168; 
I. Car. f. 40. Somewhat squarely cordate, tumid, concavely angu- 
lated in front, with about 32 narrow compressed radiating ribs, that 
are closely armed with erect scale-like slender spines, except the 
anterior ones, which are only roughened with short small scales ; 
white, sometimes tinged with pink in the costal intervals, which latter 
are concentrically traversed by raised strize, and edged on either side 
with a scarlet line; interior purple-red. 1}. Philippines. 
Carpium mMuticum (t. 17, f. 55).—C. papyraceum, Sow. C. I. Car. 
; C.m. Reeve, I. Car.¥f. 32. Transverse, suborbicular, sub- 
inequilateral, thin, merely ventricose, ochraceous-yellow, mottled or 
stained with liver-colour on the umbones; surface neither scabrous 
nor granular, radiated by fine and rather distant dotted impressed 
lines, the intervals of which assume the aspect of flattened ribs, and 
ventrally become slightly retuse in the middle near the sides; ex- 
tremities with slight and depressed costelle, the dotted line being 
there the middle ‘of the riblet; ventral edge much arcuated, rising 
more particularly behind ; dereul slopes invonsiderbles the fone one 
subhorizontal; hinder lateral teeth very large. 23...23. There 
are some arched concentric raised wrinkles near the posterior ventral 
edge. 

