

WORMS. TESTACEA. 67. Anomia. 281 



Inhabits European and American Seas, and is frequently found 

 flicking to the common oyfter ; about 2 inches long, z\ broad; 

 the outfide rugged and filmy, the infide fmooth and pearly: 

 varies much in colours, but all have generally a filvery hue. ( 



*Cepa Shell obovate unequal violet; upper valve convex, lower 

 perforated. 



Knorr. Vergn. 6. tab. g.J/'gt 5. 



Murray tejtaceol. tab. 2. fig. 13. 



Chemn. conch, 8. tab. 76. fig. 694, 69$. 



Inhabits European and American Seas; about the fize of a walnut; 

 varies in it's lhapc; lower-valve white, upper-valve reddifh- 

 blue: refembles the lalt but is much lefs and fmoothcr. 



EUflvka, Shell roundifh yellow fmooth ; one valve convex and gibbous. 

 Barbut, tab. 9. fig. 4. Rumpf. Muf. tab, 47. L. 

 Lifter, tab, 205. Jig. 39? Peti*v. amb, t, 20, f. S, 

 Knorr Vergn. 5. tab. 2^.fig< 6. 

 Chemn. conch. 8. tab. 76. fig. 691, 

 Inhabits Coalts of Africa; refembles the laft. 

 Shell fmall brittle extremely thin ; lower-valve flatter with ari 

 oval perforation and a fmall knob in the region of the hinge. 



*'Squamula Shell fmall orbicular, very entire, thin like the fcale of a 

 fifli ; one margin gibbous and fmooth. 

 Pennant Brit. Zool. iv. p. 109. n. 71% 

 Chemn conch. 8. tab. y&.ftg. 696. VV 



Found frequently in the European Sea/, adhering to oyfters crabs 

 and other fifli : Jhell minute flat delicate and filvery, one valve 

 generally perforated. 



}?.ateilifor- Shell ovate convex fubdiaphanous ftriate, the pofterior beak 

 &&• recurved and fmooth. 



Inhabits Narth Seas. Mull. Zool. Dan. prodr. 2999.- 

 Shell whicifh thin brittle, refembling Patella lutea; marked with 

 very fine longitudinal ftriae crofled by tranfverfe ones : beak 

 obfolete : lower-valve flat fmooth and perforated at the bafe. 



Scobinata* Shell roundifh, fmooth and rough within; the beak per- 

 forated. 

 Gualt. teft. tab. qti.ftg. A. 

 Chemn, conch. 8. tab, 7%-ftg* 704 ? 

 Schrcei. Joum. 3. tab, 2. Jig, 4. 

 Schrcet, Einl, in conch, 3. tab. 9. fig, 9, 



Inhabits the Ocean : thin pellucid white, very finely ftriate, (il* 

 very within ; the outer margin glabrous and acute* 



VOL. IV.-Nn Aurita. 



