OF THE FIRTH OF FORTH. 71 
under the name of Pecten glaber as being 
rare in the Firth of Forth. 
Pecten tigrinus (Mill.). 
Firth of Forth (M‘B., and Ed. Mus.). 
Taken alive in Newhaven Harbour. It 
had probably been thrown away by the 
fishermen (JZ). 
We have dredged this species in the Firth, 
and have found it cast ashore at Elie. 
P. tigrinus, var. costata. 
Single valves of this,and also of the species, 
are found on the North Berwick shore 
(IL). 
P. similis (Laskey). 
Fifeshire (Flem.) ; Firth of Forth (Laskey). 
P. maximus (Linn.). 
Firth of Forth (/‘2.). 
Single valves are cast up at Craigroyston, 
but not plentifully (J7.). 
We dredged this species last summer off 
the Isle of May, in 8 fathoms. 
MYTILIDA. 
Mytilus edulis (Linn.). 
Firth of Forth (J/B., etc.). 
Extremely common between tide marks 
and at low water on many parts of the 
shore. It occurs in profusion on the muddy 
beach at Wardie and Newhaven, where 
it is collected by the fishermen. 
M. edulis, var. uncurvata. 
Abundant on sloping walls between Gran- 
ton and Leith, wedged in between the 
stones (JZ). 
M. edulis, var. pellucida. 
Granton (J/.). 
We have taken this variety at Wardie. 
M. edulis, var. galloprovincialis. 
Cast up on Craigroyston shore (JZ). 
