102 TESTACEOUS MOLLUSCA. 
C. Lacrea. Lam. 47. Very small, rounded, oblique, pellucid, 
whitish stained with purple at the beaks. 3. 
C. Exoteta.* Lam.48.—Venus EB, Lin. 1134.—D. p. 195. 
W. t. 8. f. 83.— Don. t.42 f. 1.— HE. t. 279.f. 5.—-Bl.t 74.f. 2. 
—Ch. f. 404.—B. t. 5. f. 9.—List. 291. f. 127. § t. 292. f. 128. 
Orbicular, sub-equilateral and depressed, whitish with more or less. 
distinct rufous spots stains or rays, and sharply striated trans- 
versely ; lunule heart-shaped, sunken, and sub-lamellar : ligament 
concealed. Diam. 13.— Mediterranean and Atlantic.—(A coarser 
shell than C. Lincta.) 
C. Lincra.* Lam. 49.—Venvus Lupinus. Lin. ed. 10. p. 689. 
—V. Exoreta Junior. D. p. 196.—C. Srnvata. Turt. B. 
t. 10. f. 10.— List. t. 289. f. 125. § t. 290. f. 126. Sub-orbicular, 
oblique, inequilateral, the anterior side oblique less rounded and 
larger than the posterior, glossy white, most elegantly and closely 
striated transversely ; beaks prominent : the ligament concealed. 
Diam. 13.— England, §'c. 
C Concentrica. Lam. 50.—Venus C. . Gmel. 3286.—D. 
p- 196.— List. t. 288. f. 124.—Ch. f. 392.—E. t. 279. f. 2.—-W, 
t. 8. f. $4. Orbicular, rather depressed, white, glossy, with 
crowded equal concentric strive: lunule heart-shaped smooth and 
excavated ; cardinal cleft lanceolate. Diam. 23.—W. Indies.— 
Flatter, but not unlike Exoleta. 
C. Prosrrara, Lam.51.—Venus P. Lin. 1133.—D.p. 192. 
—B.t.5.f 6—Ch. f. 298.—EH. t. 277. f. 1. —W. 1. 8. f. 77. 
Orbicular, depressed, whitish or fulvous, with transverse striee, which 
become more elevated and membranaceous at the extremities; edge 
of the anterior slope dentated: lunule sunken and heart-shaped. 
Diam. 13 —Indian Ocean. 
C. Umponetta. Lam. 55. Heart-shaped, tumid, inequilateral, 
purplish near the beaks, whitish towards the margin, anterior side 
smooth, posterior transversely grooved: umbones tumid and tessel- 
lated ; lunule roundish, heart-shaped, and excavated : within white 
with a violet spot on the anterior side. 3.— Red Sea? 
C. Scripta. Lam. 57.—Venus8. Lin. 1135. —D. p. 201.— 
Ch. f. 420. to 425.—H. t. 274. f.1.—W. t. 8. f. 97. Lenticu- 
lar, flat, with the slopes truncated and forming a rectangle at the 
umbo, transversely grooved and compressed at the beaks; variable 
in colouring, usually liver-brown, with white markings, or white with 
reddish brown or liver-colour spots rays bands or zig-zag stripes 5 
depressions brown, linear; ligament visible — Variety. (UNnpa- 
TINA. Lam. 56.) Smaller, not quite so flat, the ligament con- 

1<C,Inrerrureta. Lam. 51.—Tigerina. 52, and Puncrara. 
53. belong to Lucina.’ Deshayes. 
