120 
O. Eputis. Lin. 1148.—Pen, 4, p. 225. t. 65. f. 2. 
—Mont. p. 15\.—Dor. Cat. p. 38. ¢. 11. f. 6.—D. 
p. 280.—Turt. D. p. 133.—Lam. 1.—List. t. 193. f. 
30.—Ch. f. 682.—Dea Cost. t. 2. f. 6:—Blain. t. 60. 
f. \.—E#. t. 184. f. 7.8.—F. p. 392.—Rounded-oval, 
rather attenuated towards the beaks, dirty white, rough, 
with concentric waved scaly foliations; upper valve less 
and flattened ; inner margin very entire. The common 
Oyster. 
O. Parasitica. Turt. B. p. 205. t. 17. f. 6,7.—F 
p. 392.—Turt. D. p. 134. f. 8.— Rounded or oblong, 
nearly smooth, the upper valve convex, greenish, often 
with radiating bands of brown. 1%. Attached to 
marine substances.—Probably a variety of Edulis and 
deriving both form and color from the Pectens, &c. it 
may have attached itself to. 
Greyus.—ANOMIA. 
Inequivalve, irregular ; with the under valve perfora- 
ted near the beak and fixed by an operculum or 
tendon ; hinge withont teeth; ligament internal, 
placed transversely under the beak. 
A. Evectrica. Lin. 1151.—Turt. D. p. 1. f. 67.— 
Turt. B. p. 227. ¢t.17. f. 8,9.—F. p 394.—Some- 
what orbicular, with the surface a litle undulated, bright, 
