TESTACEOUS MOLLUSCA. 287 



We may add the three following species of Hinnites to this 

 genus, the almost sole distinction of being attached to foreign 

 substances scarcely sufficing for generic distinctness. 



H. Sinuosus*. Sow. Th. t. 20,/. 1, 2, 3.— Ostrea, S. Gmel. 

 3319.— List. t. 172, f. V.—D.p.262.— JV. t. 10,/. 34.— Pecten, 

 S. Venn, 4, p. 222,' t. 64, /. 2.—Lam.4<9.—Turt. B. t. 9, /. 5, 

 p. 210. P. Pusio. Don. i. 34.— aSW. G — Reeve, t. 114,/. 6. 

 Tart. B. t. 17. /. 2. Oblong, thin, with close radiating scabrous 

 striae ; ears unequal, with scabrous radiating striae ; lower valve near 

 the ventral edge usually irregularly depressed and polished, regular 

 when young, distorted by age. The young (P. Isabella. 

 Macff. Ab.p. 225,) are perfectly free. 



H. Giganteus. Gray in Ann. Ph. 1826.— Sow. Th. t. 20, f. 3, 

 4, 5. — Ostrea, G. W. S. t. 2,/. 7. Irregularly oval, thick, pale 

 brown with reddish radiating streaks, and crowded radiating sulci ; 

 ears small and narrow ; hinge thick ; inside white, hinge purple. 

 5. .4. 



H. Corallinus. Sow. Th. Hinnites, p. 80. Very- irregular, 

 fine coral red, upper valve with small radiating ribs here and there 

 muricated : inside pale subfuscous, dull purple at the ventral edge, 

 muscular scar having ,the appearance of a horny substance veined 

 with the same as the other parts of the inside, its lower edges varie- 

 gated with pale dull purple ; inside composed of a distinctly 

 facetted crystalline substance with occasional black coriaceous 

 spots near the edges: lower valve paler, very rough from the 

 irregularities of the rocks to which is is attached. E. Africa. 

 (See likewise the H. Poulsoni and Nuttalii of Conrad J. A. N. S. 

 Philad. 7. 



Chenu. {111. Conch.) — Byssifer «wc?Varicolor. Dufo. (Ann.deSc. 

 Nat.— Matoni. Don. (Nat. Rep. t. 91.) — Tricarinatus and 

 Fabrtcii of Phil. Ah. und Be*. Conch. The Crebricostatus of 

 this last work must be compared with Pyxidatus and the Exca- 

 vatus with Fuscus and Sinensis : the ANTONiiseems identical with 

 Laqueatus. The P. Nebulosus of Brown (Illust. Conch. Britain.) 

 is evidently Danicus and the Dislocatus of Say ( J. Ac. Philad.) 

 is, says Conrad, a young Purpuratus. 



P. Laticostatus. Gray, (Appe. to Dieffenhach N. Zealand?) 

 is the Bifidus of Philippins Conchylien, and judging from the de- 

 scription of Deshayes in the third vol. of the Encyc. Methodique, 

 the Medius of Lamarck, 



