APPENDIX. * «869 
posteriorly, radiatingly costated; ribs more or less arched, squami- 
ferous, front ribs and their vaulted scales large, in adult examples 
usually obsolete or worn down near the dorsal corner, hinder ribs 
numerous (yet not crowded) and very narrow; ligamental edge sub- 
arcuated, rising; lunule small, deep; ligament sunken; inside livid 
brown in front, white behind; anterior teeth large, lamelliform. 
13...2. Zanzibar. 
Carpita Lacunosa (t. 18, f. 14), Reeve, 7. P. 1848, p. 193; 
I. Card. f. 31. Peaked ovate, bluntly acuminated in front, rounded 
behind, subventricose, not very inequilateral, not very solid, white, 
stained anteriorly with brownish purple, rayed with about 21 ribs, 
which are surmounted by a narrower crest-like ridge armed with 
vaulted scales; intervals profound, minutely wrinkled in a concentric 
direction; ventral edge arcuated, rising at both ends; umbones pro- 
minent; lunule small, ovate-cordiform. 3. 
CARDITA MARMOREA (t. 18, f. 18), Reeve, 7. P. 1843, p. 191; 
I. Car. f. 12. Oblong-subrhombic, extremely inequilateral, very solid, 
ventricose, whitish, with a few chocolate-brown spots on the radiating 
ribs, which are about 16 in number, rounded, deeply divided by nar- 
rowed unsculptured intervals, nodosely crenated upon the posterior 
half, smoothish (except when young) upon the anterior moiety ; liga- 
mental edge scarcely, if at all, sloping, subparallel to the ventral ; 
anterior extremity much rounded; lunule small, profound, rounded- 
heart-shaped; beaks almost terminal; inside wholly white, except 
some purple-brown spots beneath the lunule and at the end of the 
ligament. 14...2g. Australia. The inner front ribs are remarkably 
broad ; there are no vaulted scales as in the allied C. Preissii. 
CaRDITA NITIDA (t. 18, f. 23), Reeve, Z. P. 1843, p. 192; I. Card. 
f. 27.—? C. ancrneLLa, Val. Ven. —'Transversely oval, bluntly sub- 
biangular and somewhat tapering in front, rounded behind, very 
inequilateral, thick, ventricose, whitish spotted with brown upon the 
radiating ribs, that are about 20 in number, moderately distant, 
cover the whole surface, and are closely crenated; the front ribs 
narrower, their crenze subnodulous; the intervals square-cut, and 
either smooth or obscurely lyrated; ventral edge arcuated behind, 
less so in front; umbones prominent; lunule inconspicuous in the 
adult; mside whitish. +44...11. Philippines. 
On Cypricarpia (p. 149). Cousult Reeve’s monograph (Conch. 
Icon.): see, too, Mag. de Z. 1841, Proc. Bost. 1, 2, and D’Orbigny’s 
Cuba Shells. 
Cypricardia angulata, p. 149, t. 18, f 27. 
CYPRICARDIA OBESA (t. 18, f. 29), Reeve, Z. P. 1843, p. 196; 
I. Cyp. f. 10. Subrhombic, obliquely truncated in front, very in- 
equilateral, solid, tumid, both within and without of an uniform 
) 
