134 TESTACEOUS MOLLUSCA,. 
anteriorly, and oblique transverse striz posteriorly, pale yellowish 
white with scattered red spots, and six or seven oblique stripes of 
the same colour on the smooth anterior slope: within white 
tinged with yellow towards the beaks. 2..1}.—Indian Ocean. 
C. Pecrinatum. Lam. 29.—Murray. Fund. Test. t. 3. 
f. 18. Somewhat heart-shaped, transverse, whitish with twenty- 
five transversely and rather distantly grooved ribs, umbones yel- 
lowish. 14.— Mediterranean.—‘ Less inequilateral than the two 
succeeding.’—Lam. ‘ Probably a variety of Edule.”—Drsn. 
C. Rusticum. Lam. 30.—Lin. 1124.—D. p. 128.—Ch. 
f- 193.  Transversely ovate, antiquated, with from twenty to 
twenty-two distant ribs and the interstices wrinkled and broader 
than in Edule; whitish with the umbones reddish brown, some- 
times marked with yellowish bluish or brown bands: brown 
within. Adriatic.—Probably a variety of Edule. 
C. Epute.* Lin. 1124.—D. p. 127.—Lam. 31.—W. t. 5. 
f. 26.—-Ch. f. 194.—Pen. 4. t. 51. f. 40.—Wood. G. C. t. 55. 
f. 4. Rounded heart-shaped, becoming obliquely heart-shaped 
from the anterior side being produced by age, with about twenty-six 
ribs, which are crossed by transverse wrinkled somewhat imbricated 
strie, whitish or pale rust colour with the interior white and 
anteriorly stained with brown.— Hurope.* 
C. Grorentanpicum.* Lam. 32.—Gmel. 3232.—D. p. 129. 
—E. t. 300. f. 7.—(Youne. Ch. f. 198.)— Gould. Mas. p. 92.— 
W.t. 5. f. 28.—Macrra Rapiata. Don. 5. t. 161.—W. t. 6. 
Sf. 17.—Turt. Biv. p. 75.—D. p. 138.—C. Epentutum. Mont. 
—Sow. G. f. 2.—Apuropite Cotumsa. Lea. Am. Trans. 5. 
t. 18. f. 54. Large, not thick, subtriangular, elevated, rather 
compressed, subequilateral, posteriorly rounded, anteriorly shghtly 
gaping, drab coloured with very numerous obsolete radiating 
ridges: beaks slightly prominent, incurved; within salmon- 
coloured at the margin, the disc opaline : usually no cardinal teeth, 
the lateral small but distinct. 2.3, ..23.—Young, often with rusty 
brown stripes or angular markings.— Atlantic. 
C. Latum. Gel, 3255.—D. p. 125.—E. t. 296. f. 7.—Ch. 
f. 192, 3.—Wood. G. C. t. 57. f. 4, 5.—W. t. 5. f. 42. Trian- 
gularly ovate, very inequilateral; whitish with yellow spots and 
irregular bands, and the beaks tinged with violet, with about forty 
flattened ribs, which are separated by very narrow and shallow grooves, 
and have a row of minute elevated points : within white, brownish 
near the beaks. 14..2.—Zranquebar and Nicobar Isles. 


1. Fascratum. of Montagu. Sup. t. 27. f. 6. p. 30.— Turt. 
Biv. p. 189.—W. t. 5. f. 13. is the young (fide Sowerby in C. I.) 
of this species. 
2 ¢. Crenuutatum. Lam. 54. isa Variety. 
