_ 
2 
Ol 
~ 
(e'9) 
10 
11 
13 
Wood’s Linnean 
names. 
5 ARCINELLA 
hedgehog 
TORTUOSA 
twisted 
Noz 
Noah’s 
BARBATA 
bearded 
IMBRICATA 
imbricated 
NAVICULARIS 
boat 
PLICATA 
plaited 
7 CANDIDA 
white 
COMPLANATA 
compressed 
MAGELLANICA 
Magellanic 
LACERATA 
hairy 
BICOLORATA 
2-coloured 
OVATA 
oval 
CANCELLATA 
channelled 
Lamarckian 
Genus. 
ARCA. 
Authority—Synonyms—Locality. 
Chama Lin. Sys.—Ch. vii. f. 522, 3.—Lam.— 
Sow. G. f. 3.— Reeve, I. iv. Ch. f. 
26. W. Indies. 
ARC A—ARK. 
Area 
Lin. Sys.—Ch. vii. f. 524, 5.—Lam.— 
Han. R. 8. 152.—Reeve, I. Ar. f. 
86. Singapore. 
Lin. Sys.—Lam.—E. M. pl. 805. f. 2. 
—Reeve, I. ii. Ar. f. 72. 
Mediterranean. 
Lin. Sys.—Ch. vii. 187, f. 585.—Poli, 
Sic. pl. 25, f. 6, 7—Lam.—Reeve, 
I. Are. f. 883.—A. reticulata, Turt. 
D. B. 168, 259. Mediterranean. 
Wood (as of Brug.) I. T.—A. Noe, 
var. Ch. vil. 188, f. 582.—A. retusa, 
Lam. teste Philippi. Suez. 
Brug. E. M.—Phil. Ab. N. C. ii. 210, 
Ar. pl. 3, f. 2.—A. Noe, var. Ch. 
vil. 184, f. 533. Amboyna. 
Ch. xi. f. 2008.—Dil. RB. 8. 227. 
Red Sea. 
Ch. (as of Helbling) vi. f. 542. 
W. Indies. 
Ch. vil. f. 544, 5.—Dil. R. 8. 228. 
Guinea. 
Ch. vii. f. 589.—Dil. R. $. 229 — no. 
3, teste Phil. ‘ Straits 
of Magellan ; Mediterranean ? 
Lin. Mus. Tes.—Ch. vi. f. 539.— 
Desh. ed. Lam.—Han. R. 8. 155.— 
Reeve, I. ii. Ar. f. 93. Philippines. 
Ch. xi. f. 2007.—A. fusca, Brug.— 
Han. R. 8. 154.—Reeve, I. 1. Are. 
f, 82. Red Sea; Philippines. 
Gm. from A. nivea, Sc. of Ch. vii. 191,f. 
538 as A. foliata, Forsk.—Lam.— 
Han. R. 8. 153. Red Sea. 
Gm. from Schrot. Ein. ui. pl. 9, f. 2. 
— Dil.’ 230. Curacoa. 
