84 THE INVERTEBRATE FAUNA 
This species is very common from the 
upper laminarian zone downwards. We 
have dredged it east of Inchkeith, in 
18 fathoms; off Longniddry, in 14 
fathoms; west of Inchkeith,in 5 fathoms ; 
and have collected it at Aberdour, Elie, 
and Largo. 
Saxicava rugosa, var. minuta. 
Granton, North Berwick, and Dunbar (JZ). 
We have some specimens of this variety 
from Largo Bay. 
S. rugosa, var. arctica. 
Firth of Forth (£B., and Cunningham). 
On tangle roots at Granton, ete. (JZ). 
GASTROCHANID. 
Gastrochena dubia (Penn.). 
On Craigroyston beach, after a storm, I 
picked up a fossil coral, containing in 
cavities fresh but empty shells of G. 
dubia (J). 
PHOLADIDA. 
Pholas dactylus (Linn.). 
Firth of Forth U/‘B.). 
P. candida (Linn.). 
Firth of Forth (/. and H., Ed. Mus., and 
M‘B.); Newhaven, containing the animal 
(1Z.). 
We have found dead valves at Cramond 
Island, Aberdour, and in Largo Bay. 
P. crispata (Linn.). 
Firth of Forth (7. and H,, MB., and Ed. 
Mus.) ; Granton, west of harbour, alive at 
very low water, also North Berwick (JZ) ; 
near Cramond (J. Hunter Barron). 
We have found this species alive at 
Wardie, and at Cramond, and have found 
dead valves at Largo and other places. 
