OF THE FIRTH OF FORTH. 83 
perfect specimen (young) on the shore at 
Cramond Island (JZ). 
We have dredged this species frequently 
in the Firth—in Aberlady Bay, 9 
fathoms; west of Inchkeith, 5 to 7 
fathoms, etc. 
Myip&. 
Mya arenaria (Linn.). 
Firth of Forth (B., Ed. Mus., and F. and 
H.); Bass Rock, 24 fathoms (Metz. and 
Mey.); Granton, living at low water west 
from Leith pier (J/.). 
We have found this species in Largo Bay. 
M. arenaria, var. lata. 
Biel sands, Longniddry, and Newhaven. 
Rather common in west harbour, Granton, 
(i). 
We have found this variety at Aberdour. 
M. truncata (Linn.). 
Firth of Forth, from low water to 
7 fathoms (7. and H.); Firth of Forth 
(M‘B.). Living at Granton, Craigroyston, 
and Cramond Island (JZ). 
We have found this species at Portobello, 
and have dredged it in 4 fathoms, to the 
west of Inchkeith. 
M. binghami (Turt.). 
Firth of Forth (7. and H., and MB.). 
SAXICAVIDA. 
Saxicava rugosa (Linn.). 
Firth of Forth (MB); Firth of Forth, 
7 fathoms (/". and #H.). 
Taken living, and apparently at home, 
in pure sand, between Granton and 
Cramond Island (JZ). 
