CARDIUM. 33 
foeabenesee Bent rn Authority—Synonyms—Loeality. 
20 MAGNUM Cardium Wood, G. C. (not Lin.) 221, pl. 53, 
great f, 3.—C. leucostomum, Born.—Han, 
R. S. 1382.—C. marmorewm, Lam. 
Ceylon. 
21 LEVIGATUM — Penn. (not Lin.) B. Z, f. 40.—Donov. 
smooth B.S. pl. 54.—Wood, G. C. pl. 21, 
f. 1.—Phil. Sie.—C. serratum, Lam. 
(not Lin.)—Turt. D, B. pl. 13, f. 5. 
—C. oblongum, Reeve (not Ch.) I. 
Car. f. 71—C. Pennantii, and C. 
vitellinum, do, f. 48, 37.—C. Norve- 
gicum, Speng. (Brit. Mol. ii. 35, pl. 
31, f. 1, 2.) is to be preferred. 
Britain, Sc. 
22 cCITRINUM —— Wood, G. OC. 223, pl. 54, f. 3.—Sub- 
citron sequent to C. serratwm, Lin. Syst. 
—Han. R. 8. 133.—Reeve, C. I. ii. 
Car. f. 1.—C. levigatum, Speng.— 
Lam. W. Indies. 
23 OBLONGUM — Ch. vi. 195, f. 190.—Wood, G. C. pl. 
oblong 55, f. 1.—C. flavum, Born. (not 
Lin.) pl. 3, f.8.—C. swdeatwm, Lam. 
—Han. R. 8. 183.—C. obsoletum, 
Speng. Sk. Nat. v. pt. 1, p. 28. 
Mediterranean. 
24 FLAVUM —  Schrot. (as of Lin.) Ein. ii. pl. 7, f 
yellow 11.—Speng. Sk. Nat. v. pt.1, p. 22, 
pl. 1, f. 2.—C. rugosum, Lam. 
Indian Ocean. 
25 RUSTICUM —— Lin. Syst.—Poli, T. Sic. pl. 16, f. 5.— 
banded Wood, G. C. 225, pl. 55, f. 2, 3— 
Brit. Mol. ii. 11, pl. 31, f. 3, 4. 
Britain, Sc. 
26 EDULE —— Lin. Sys.—Ch. vi. 198, f.194,—Donoy. 
common. B.S. pl. 124, f. 1—Wood, G. C. 
226, pl. 55, f. 4. —Lam.—Reeve, C. 
FB 
