282 WORMS. T£STACEA. 67. Anomia. 



Aurita, Shell fubovate ftrjate and {lightly eared; beak perforated. 

 Cualt teft. tab.-g6.-Jig. B. 

 Inhabits Norway Seas ; refembles A. Caput ferpentis. 



Retuja. Shell obovate flriate retufe with a longtitudijial concavity j 

 beak perforated. 

 Fn. Suec. 2153. Mull. Zool Dan. ftrodr. 3000. 

 Inhabits Nor<iyay Seas, adhering to Zoophytes, 



*Gryf>bus' Shell oblong fmooth,.with an obfolete lateral plait on one 

 valve and incurved beak, the other valve fhort and 

 fiattifb. 



Muf. Tejftn tab. $.fig. 9. Qlear. Muf. t. $$*/. 3. 



Riunpf. Muf. tab. 59. B. Bonan recr. 2. fig. 31. 



Lifter an. Angl, p. 238. tab. %-fig, 45. 



Column, aq. p. ^^-fig- S 2 ' 



Found frequently in a foflile ftate ; Jkell lamellate wrinkled, va- 

 riable in form and fize. 



* PeSIens. Shell femiorbicular deprefTed with numerous ft rise : one 

 valve flat. 

 Lifter an. Angl. p. 24.3. tab, 9, fig* 49. 

 Found in a foflile ftate : jhell with a tranfverfe line near the hinge. 



Striatula* Shell roundifh and a little dilated, gibbous each fide, ftriat'ejy 

 valves equal. 

 Found hitherto in a foflile ftate only. 



Shell roundiih, but much broader than it is long, more gibbous. 1 

 behind, the anterior margin thin. 



*Truncata. Shell fuborbicnlar obfoletely flriate \ the hinge truncate. 



Lister conch, tab. 462. fig, 23. 



Lister, anim Angl. tab. 9. fig. 50. 



Born Muf. Cas. Find. test. t. 6./. 4. 



Chemn. conch. 8. tab yy. fig* 701. a, b, 



Schrtzt. Journ. 3, tab, Z.fig. 5. 



Inhabits European Seas, affixed to corals; relembles A. flriatula, i 

 but has a ftraight jagged hinge : Jhell whitifh, broader than it I 

 is long, convex with very fine decuiTate wrinkles, within 

 granulate. 



v ,. / • Shell heart-fhaped with decuffate ftrire, the fhorter valve 

 Reticular is • .. , r * 



more gibbous. 



Muf lejpn.p. 88. tab. $.fig. 5. 



Found foflile ; Jhell with rather prominent comprefTed fides, the 



beak q{ the flat valve a little prominent, 



Plicatella, 



