80 THE INVERTEBRATE FAUNA 
We have dredged it in Aberlady Bay, 9 
fathoms, and off Leith. 
Psammobia vespertina (Chemn.). 
Firth of Forth U“B., and J. G. J.). 
Donax vittatus (Da Costa). 
Firth of Forth ZB.) ; Craigroyston, Aber- 
lady, and Dirleton shores (JZ). 
We have found it at Ele and Largo. 
MACTRIDA. 
Mactra solida (Linn.). 
Beach at Fisherrow (Metz. and Mey.); 
Firth of Forth (Z#d. Mus., and MB.). 
We have dredged it off Khe. 
M. solida, var. truncata. 
Firth of Forth (UB, and J. G. JS); 
Firth of Forth, 7 fathoms (. and #,). 
Lives with the species, and with inter- 
mediate forms, on the shore from New- 
haven to Cramond Island (JZ). 
We have obtained this variety on Cramond 
Island. 
M. solida, var. elluptica, 
Firth of Forth (ZB., and F. and #.). 
M. subtruncata (Da Costa). 
Firth of Forth (7. and H., and M‘B.); 
Granton and Portobello (JZ). 
We have dredged it in the Firth. 
M. subtruncata, var. striata. 
Granton, not common (JZ). 
M. subtruncata, var. inaequalis. 
Dead shells at South Queensferry (JZ). 
M. stultorwm (Linn.). 
Firth of Forth (IB. and Ed. Mus); 
Portobello (JZ). 
This species is sometimes found cast up in 
large quantities on Portobello sands after 
storms. 
