OF THE FIETH OF FORTH. 89 



Trochus cinerarius (Linn.). 



Firth of Forth (MB., and Ed. Mus.) ; beach 

 between Portobello and Fisherrow (Metz. 

 and Mey.). 



This is a very common species in the Firth 

 about low water mark. It is abundant at 

 Granton, Wardie, Aberdour, Elie, and other 

 parts of the coast. We have also dredged 

 it off Inchkeith in 5 fathoms. 



T. zizyphinus (Linn.). 



Firth of Forth (MR). 

 Not common here. I have found dead 

 shells on the beach at Edinburgh and 

 Dirleton (M.). 



LITTORINID^E. 



Lacuna crassior (Mont.). 



Firth of Forth (Ed. Mus., and M'R). 



Not rare on the beach at Wardie, Granton, 



and North Berwick (M). 

 L. divaricata (Fabr.). 



Firth of Forth (Ed. Mus., and MR, as 



L. vincta). 



Common on Laminaria, etc., at Granton, 



North Berwick, Dunbar, and other places 



L. divaricata, var. canalis. 



With the species at North Berwick, etc., 



somewhat common at Granton (M). 

 L. divaricata, var. quadrifasciata. 



On the beach at Leven, Fife (M.). 

 L. pallidula (Da Costa). 



Firth of Forth (Ed. Mus., J. G. J., and MR). 



Common on Laminaria, etc., at Granton, 



North Berwick and Dunbar (M.). 



We found this species in Largo Bay. 

 Littorina obtusata (Linn.). 



Firth of Forth (Ed. Mus., and MB.); 



