SYNOPTICAL LIST. 



55 



The following species should be omitted from the Synoptical List altogether, viz. TropTion Norvegicus, see p. 7 ; Pleuro- 

 toma violacea, see p. 20 ; and Pholas dactylus, see p. 49 ; and from the Coralline and Red Crag columns of the list, Ostrea 

 edulis, see p. 42. 



