CONCHYLIA—JD/Tfl Fi2^. 46. 213 



Pecten lacvis. Pennant, Brit. Zool, iv. p. 223. 



Montagu, p. 150, Suppl. p. 61, tab. 4, fig. 4. 



Tiirton, British Fauna, p. 162. 

 Ostrea laevis. Turton, Concli. Diet. p. 131. 



Turton, Linn. Syst. iv. p. 266. 

 Ostrea similis. Laskey, VVerri. Soc. i. tab. 8, fig. 8. 

 Anglesea and the western coasts. 



Shell about half an inch in diameter, orbicular, thin, smooth 

 except a few transverse wrinkles, yellowiih white often marbled 

 with brown : one ear large, the other small. 



Some specimens which we examined in the cabinet of Mr. 

 Gordon, dredged up by himself in Torbay, appeared to have the 

 ears nearly equal, much more so than they are represented in 

 Montagu's figure. It may be therefore that this species is subject 

 to much irregularity, and that our Pecten tumidus is a variety only. 



9. 



Pecten testa cequivalvi, striis numerosissimis minutissimis obsoieius. 



longitiidinalibus subnndafLs. 

 Shell equivalve, with very numerous and minute slightly undulate 

 longitudinal striae. 



Tab. nost. 9, fig. 6. 

 Pecten obsoletus. Pennant, Brit. Zool. iv. p. 222. tab. 64, fig. 3. 

 -Donovan, British Shells, i. tab. 1, fig. 2 

 Montagu, Test p. 149, and Suppl. p. 57. 

 Turton, British Fauna, p. 162. 

 Pecten parvus. Da Costa, Brit. Conch, p. 153. 

 Ostrea obsoleta. Turton, Linn. Syst. iv. p. 266. 

 Linn. Trans, viii. p. 100. 



