132 TESTACEOUS MOLLUSCA. 
f- 1, 2.  Obliquely heart-shaped, tumid, sub-equilateral, longer 
than broad, whitish with irregular reddish brown spots, and 
crowded longitudinal ribs which are covered with erect vaulted 
anteriorly elongated scales, and have very narrow interstices : within 
white, stained centrally with red, and the margin serrated. 2..13-. 
—W. Indies.—The Consors of Som. C. I. is probably but a 
variety of this species. 
C. Muricatum. Jin. 1123.—D. p. 120.—Lam. 18.—Wood. 
GRC tS lif 2 — Watson fol Clin fl 4 C= E297 
f. 1. Ovate heart-shaped, longer than broad, flesh-coloured or 
yellowish stained or spotted with reddish chocolate ; with numerous 
flattish ribs equal in breadth to the interstices, with their sides 
armed with oblique flattish spines, which all excepting about a dozen 
at the posterior extremity, point anteriorly; anterior serrated 
margin edged with red yellow or scarlet : within with two purplish 
brown rays. 13..14.—W. Indies.—S. Carolina.—Spines in- 
distinct towards the centre. 
C. Aneutatum. Lam. 19.—Seba. mus. 3. t. 86. f. 6.— 
Longitudinal, ovate, oblique, whitish with purplish bands towards 
the margin, and thirty-two ribs which are angulated on the upper 
surface, transversely grooved, and the posterior ones crenulated as it 
were obliquely by some elongated tubercles. 23.—America?— 
Deshayes asserts that the Museum specimen is only a large C. 
Rugosum. 
C. Leucostomum. Born. t. 3. f. 6, 7.—D. p. 121.—Ch. ff. 
179.—C. Magnum. Var. B. Gmel. 3250.—W. t. 5. f. 20. 
—C. Marmoreum. Lam. 20.—List. t. 331. f. 168.—2#. t. 
297. f. 3. Longitudinally oval, moderately convex, subequilateral, 
white mottled with orange and red, with thirty-two prominent ribs, 
which are crenated on both sides, are larger than their interstices and 
somewhat tuberculated at the posterior extremity; on the anterior 
side where sometimes are a few lanceolate prickles, the margin is 
serrated and tinged with yellow; white within.—Variety. Larger, 
with the posterior depression glabrous and lanceolate. 22..2. 
—Jamaica.— Ceylon. 
C. Exoneatum. Lam. 21.—Brug. Dict. no. 26. (except 
synonyms. )—An. Seba. 3. t. 86. fi 22—C. I. f. 49? Longi- 
tudinally oblong, subequilateral, white mottled with yellow or 
fulvous, with forty flattened serrated ribs which are angular at 
their sides, and the posterior ones transversely grooved ; within 
white with a purple spot anteriorly. Length 33.—W. Indies.— 
More tumid and elongated than the last. 
C. Ventricosum. Brug.—Lam. 22.—D. p. 121.—W. t. 5. 
Sf. 19.—Last. t. 328. fi 165.—E. t. 299. f2 1.—C. Macuratum. 
Gm. 3255. Very large, obliquely heart-shaped, longer than broad, 
very inequilateral, ventricose, subdepressed anteriorly, ferruginous 
with brown spots of irregular bands; with from thirty-three to 
