WORMS; TESTACEA: 66. Oftrea. ona 
Glacialis; Shell equivalve, with 50 imbricate interrupted rays: cars 
equal, one of them unequally plaited. 
Lifter conch. tab, 176. Klein ofirs t.9. f: 525 53* 
Knorr Vergn. 6. tab. 38. figs 5. 
Chemn. conch. 7. tab. 68. fig. 652. 
2. Chemn. conch. 7. tab. 686 fig. 653. 
Inhabits the American Ocean; refembles the laf, but has more 
numerous rays: she// {mowy with a crenate mergin; 2) mar- 
gin entire. 
Hians: Shell whitifh; thin, gaping tach fide ahd oblique, with 
obfolete uridulate rays and tranfverfe rounded femi- 
lunar ftriz. . 
Schreét. Einl. in conch. 3. tab. 9, figs 4. 
Inhabits Norway ; 1i inch long, i of am inch broad: ears very 
{mall and acute : margin crenate, very entire within, 
Excavatd, Shell dirty-white, with longitudinal undulate ftriz and a 
few tranfverfe rings, fmooth withiri: one ear obío- 
lete: margin very entire. 
Chemn. conch. 7. tab. 68. f. O54. 
Inhabits Norway; rare:'$ inches long, 3j broad. 
B. Reugh and generally plated on the outfide. Oyftets. 
Madtleuse Shell equivalve .3-lobed, 2 of the lobes placed tranfverfely 
like the head of a hammer. 
Barbut, tab. 9. fig. 1s Rumpf. Muf. tab. 47. H. 
Argenv, conch, iab. 19. A. Gualt, test. tab. 96. D ? 
Lif. tab. 219.  Bonany Muf. Kircb, 2: fig. 120; 
Petiv. Amb, aq: tab. 20, fig. 19. 
Seba Muf, 3. tab. 91. f. 4, 5+ tab. 93. f. 1,2. 
Spengler teft. conch, tabs 1. fig. A. 
Chemin. conch. 8. tab. 70. fig. 655, 656. 
Inhabits deeps of the /zdzaz and South Seas : very rarc. 
Shell about 6 inches long and 43 broad; black with a dark blue 
caft, gaping, formed like a crofs; the valves !amellate, 
Valfellas Shell fabpellucid, narrow, elongated, brittle, lamellate ; one 
end rounded ; within very {mooth and glotly. 
Chemmn. concb. 8. tab. 70. fig. 657. 
2. Mart. allg. Naturf 4. tab. 147, fig. 2. 
Inhabits the Red Sea: 3% inches long, 1 broad. 
Shell violet, tawny or terruginous, gaping at the hinge; rough 
on the outfide, and thinner at the rounded end. 
" en VOL. IV.—M m Anatina. 
