WORMS. TESTACEA; 66. Oftrea. 
273 
Shell equivalve, with 50 imbricate interrupted rays : cars 
equal, one of them unequally plaited. 
Lifter conch, tab, 176. Klein ofir. 33, 
Knorr Vergn. 6. tab. 38, fig. ij. 
Chemn, conch. tab.b%. fig. 652. 
2. Chemn. conch. 7. tab. bi, fig. 653, 
Inhabits the American Ocean-, refembles the laft, but has more 
numerous rays; fnowy with a crenate margin ; 2) mar- 
gin entire. 
Shell whitifh, thin, gaping each fide ami oblique, with 
obfolete undulate rays and tranfverfe rounded femi- 
lunar ftrix. 
Schrat. Einl. in conch. 3. tab. <), figi 4. 
Inhabits Noriuay ; i| inch long, f of an inch broad ; ears very 
fmall and acute : margin crenate, very entire within. 
Shell dirty-white, with longitudinal undulate ftriae and a 
few tranfverfe rings, fmooth within; one ear obfo- 
lete: margin very entire. 
Ohemn. conch- 7, tab. 68. /i 654. 
Inhabits Norvjay, rare: 5 inches long, 35 broad; 
B. Rough and generally plated on the outftde. Oyfters. 
Shell equivalve 3-lobed, 2 of the lobes placed tranfverfely 
like the head of a hammer. 
Barbut, tab. g, hg. I. Rumpf. Muf. tab. 47. H. 
Argennj. conch, tab. ig. A. Gualt, test. tab. g6. D ? 
Lifi. tab. 2ig. Bonan, Muf. Kirch, z. fig, izo, 
Petiv. Amb. aq- tab. ZO, fig. 10. 
Seba Muf. 3. tab. gi, f. 4, 5. tab, g3. f. 1,2. 
Bpengler left, conch, tab, 1 . fig, A. 
Chemn. conch. 8. tab. 70. fig. 655, 656. 
Inhabits deeps of the Indian and South Seat : very rare. 
about 6 inches long and 4J broad? black with a dark blue 
call, gaping, formed like a crofs ; the valves lamellate. 
Shell fubpellucid, narrow, elongated, brittle, lamellate ; one 
end rounded ; within very fmooth and glofly. 
Chemn. conch. 8. tab. 70. fig. 657. 
2. Mart. allg. Naturf- tab. fig. z. 
Inhabits the Red Sea: inches long, 1 broad. 
Shell violet, tawny or ferruginous, gaping at the hinge; rough 
on the oatlide, and thinner' at the rounded end. 
VOL. IV.— Mm 
Anatina, 
