388 ACCOUNT OF 



Pec ten. 



tagu of the true Pecten 

 laevis* I find it to be di- 

 stinct. I have therefore 

 for the present named it 

 simihs. It is a thin semi- 

 transparent shell, with un- 

 equal ears, of a compress- 

 ed globose form, perfectly 

 smooth, and beautifully 

 clouded with brown. I 

 have seen shells from the 

 Mediterranean, particular- 

 ly from Minorca, strongly 

 resembling this specimen ; 

 two odd vaives of which 

 have only been met with 

 by the dredge in the Frith 

 of Forth. 



OSTREA. 



Animal a Tethys. Shell bivalve, inequivalve, 

 rugged or plaited. No auricles. Hinge tooth- 

 less, with a transverse striated cavity. 



|, edulis. P.M. Leith Roads, Prestonpans, 



&c. very plentiful, and 

 forms an article of com- 

 merce. 



