82 THE INVERTEBRATE FAUNA 
ron); Bass Rock, 24 fathoms (Metz. and 
Mey., as Cultellus pellucidus). 
Solen ensis (Linn.). 
Firth of Forth (MW‘B., and Ed. Mus.). 
We have taken Solen ensis frequently. 
S. siliqua (Linn.). 
Firth of Forth (B., and Ed. Mus.). 
We dredged it lately west of Inchkeith, in 
4. fathoms. 
S. suliqua, var. arcuata. 
Newhaven shore (JZ). 
ANATINIDA, 
Thracia pretenuis (Pult.). 
Firth of Forth (B., and F. and #.). 
T. papyracea (Poli). 
Firth of Forth (£d. Mus., and MB.). 
We have taken this species frequently at 
Portobello, Cramond, ete. 
T. conveca (W. Wood). 
Firth of Forth, dead shells (/‘B.). 
Single valves not unfrequent on the 
shore near Edinburgh, at low water, 
especially towards Cramond Island (JZ). 
T. distorta (Mont.). 
Firth of Forth (F. and H., and M‘B.). 
CoRBULID. 
Necera cuspidata (Olivi). 
Off Portseaton and Fidra, 17 fathoms 
(Thomas) ; Firth of Forth (F. and H., and 
M'B.). 
Corbula gibba (Olivi). 
Firth of Forth (Zd. Mus, MB., and F. 
and H.). 
Single valves are frequent on the shores 
at North Berwick, Newhaven, Granton, 
and South Queensferry. I have taken a 
