CONCHYLIA— D/THYi?^. 46. 213 



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



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



Turton, British Fauna, p. 162. 

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



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

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



Anglesea and the western coasts. 



Shell about an inch in diameter, orbicular, thin, smooth except a 

 few transverse wrinkles, yellowish white often marbled with brown : 

 one ear large, the other small. 



Some specimens which we have examined in the cabinet of Mr. 

 Gordon, dredged up by himself inTorbay, appeared to have the ears 

 nearly eq^ual, 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 is a variety only. 



Pecten testa aquivalvi, striis numerosisimis minutissimis longitudinal- obsoletus. 



ibus svbundatis. 

 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. 

 Ldnn. Trans, viii. p. 100. 



