TRIBE CARDIACEA. 137 
subangulated ; white spotted with brown, the ribs numerous 
and flattened, the five posterior crenulated : interstices narrow. 
3+. §.— Sicily. 
C. Pavcicostatum. Sow. Jun. Z. P. 1840.—C. I. f. 20.— 
Reeve. t. 86. f. 20. Rounded, ventricose, subequilateral, thin, 
yellowish white, waved with brown : with sixteen flattened smooth 
distant ribs which are armed in the middle with sharp tubercles ; 
the interstices flattened. 1..1-3,.—Malta. 
C. Muttispinosum. Sow. Jun. Z P. 1840.—C. I. ff. 38. 
Rounded, ventricose, thin, anteriorly slightly gaping, pale fulvous, 
rosy at the margin and white within; with thirty-three smooth 
ribs, which are angulated on both sides ; the spines numerous and 
acute ; the interstices granular, elongated at the margin: dorsal 
edge tumid. 21..211,— Philippines. 
C. Exasperatum. Sow. Jun. Z. P. 1840.—C. I. fi 37. 
Ventricose, rounded-subquadrangular, white tinged with rose- 
colour at the margins; finely grooved; with numerous spines 
between the sulci. 12..1.— Swan River. 
C. Paprtiosum. Poli. t. 16. f. 2,3,4—C. I. f. 59.—Phil. 
p. 51.—C. Porn. Payr. p. 57. Small, sub-orbicular, convex, 
whitish, anteriorly longer: with about twenty-four subequal flat- 
tened ribs, which are armed with short granular more or less distant 
papille ; interstices narrow, with impressed dots: inside spotted 
with purplish red. +.—Mediterranean. 
C. Granirerum. Brod. & Sow. Z. J. 4.—Reeve. t. 86. f. 
17.—C. I. f. 17. Suborbicular, anteriorly angulated, white with 
sixteen radiating grained ribs, the anterior ones crowded, the pos- 
terior ones with larger granules ; the interstices with elegant longi- 
tudinal strie. 11..9..— Pacific. 
C. Betcuert. Brod. & Sow. Z.J. 4. tab. 9. f. 3. Obovate, 
suboblique longer than broad, orange-yellow, redder anteriorly, 
with twenty-four radiating ribs of which the anterior have muri- 
cated, the central serrated, and four or five posterior ones distantly 
tuberculated teeth, but all placed on the anterior edge, and only 
glossy posteriorly : posterior margins acutely serrated. 1-75..1-95. 
— California. ‘ 
C.Senticosum. Sow. Z. P. 1833.-—Reeve. t. 84. f. 10.— 
C. I. f. 10. Suborbicular, rather compressed, whitish, variegated 
with purplish brown ; with about forty radiating ribs, of which the 
thirteen posterior ones are posteriorly granular, then two or three 
granular on each side, the rest anteriorly angulated, granular, the 
grains oblique and the anterior ones larger ; the interstices narrow 
and transversely wrinkled : anterior side grinning, the marginal 
teeth strong and purplish. 1}3..13.—S. America.—-Akhin to Mu- 
ricatam, 
