WORMS. TESTACEA. 67. Anomia. 281 
Inhabits European and <Avmerican Seas, and is frequently found 
{ticking to the common oyfter ; about z inches long, 2t broad; 
the outfide rugged and filmy, the infide fmooth and pearly: 
varies much in colouts, but all have generally a filvery hue. 
* Copa Shell obovate unequal violet; upper valve convex, lower 
perforated. 5 
Knorr. Vergn. 6. tab. 9. figs $< 
Murray teflacecl. tab. 2. fig. 13. 
Chemn. conch. 8, tab. 76. fig. 694, 695. 
Inhabits Éurepeaz and American Seas; about the fize of a walnut; 
varies in it’s fhape: lower-valve white, upper-valve reddifh- 
blue: refembles the laft but is much lefs and fmoother. 
Eháüriz. Shell roundifh yellow fmooth ; one valve convex and gibbous. 
Barbut. tab. 9. fig. 4. Rumpf. Muf. tab. 47. L. 
Lifter. tab, 205. fig. 39? Petiv. amb. t. 20. f. 8. 
Knorr Vergn. 5, tabs 25. fig, 6. 
Chemn. conch; 8. tab. 76. fig. 691, 
Inhabits Coafts of 4frica; refembles the laft. 
Shell {mall brittle extremely thin; lower-valve flatter with an 
oval perforation and a {mall knob in the region of the hinge. 
"Squamula Shell {mall orbicular, very entire, thin like the fcale of a 
fith; one margin gibbous and fmooth. 
Pennant Brit. Zool. iv. p. 109. 2. 710° 
Chemn conch. 8. tab. 76. fig. 696. 
Found frequently in the European Seas, adhering to oyfters crabs 
and other fifth: jhe// minute flat delicate and filvery, one valve 
generally perforated. 
Patellifor-. Shell ovate convex fubdiaphanous ftriate, the pofterior beak. 
"mis. recurved and fmooth. ; 
inhabits Narth Seas. Mull. Zool. Dan. prodr, 2999. 
Shell whitith thin brittle, refembling Patella lutea; marked with 
_vety fine longitudinal ftriz crofled .by tranfverfe ones: beak 
obíolete: /ower-valve flat {mooth and perforated at the bafe. 
Seobinatas Shell roundifh, fmooth and rough within; the beak per- 
forated. 
Gualt. tef. tab. 96. fig. A. 
Chemin, conch. 8. tab. 78. fig. 704? 
~ Schrat, Tourn. 3. tab. 2. fige 4. 
Schret. Einl, in conch. 3. tab. 9. fig. 9, 
Inhabits the Oceaz : thin pellucid white, very finely ftriate, fii. 
very within; the outer margin glabrous and acute: 
2 VOL. IV.—N n Aurita, 
