3 82 



ACCOUNT OF 



DONAX. 



Animal a Tethys. Shell bivalve, with generally 

 a crenulate margin ; the anterior margin very 

 obtuse. Hinge with two teeth, and a single 

 marginal one, placed a little behind, rarely 

 double, triple, or wanting. 



1. trunculus. P. D. M. Rather common on the 



shores of the Frith. 



Animal a Tethys. Shell bivalve ; the frontal 

 margin flattened, with incumbent lips. Hinge 

 with three teeth, all of them approximate, the 

 lateral ones, divergent at the tip. 



2. castanea. 



3. plebeia. 



M. Dunbar, very rare. 

 M. Dunbar, very rare. 



VENUS. 



M. 

 D. 

 M. D. 

 P. 



Belton Sands, and other parts 

 of the coast, not common. 



Dunbar, scarce. A speci- 

 men here dredged of an 



3. orbiculata. 



M. 



uncommon size. 

 New shell, near Dunbar, 



rare. 



M.D. 



P. 



Dunbar and Leith Roads ; 

 very plentiful on the san- 

 dy shore of Aberlady, and 



