292 Proceedings of the Royal Fhysical Society. 



perfect specimen (young) on the shore at 

 Cramond Island {M). 

 We have dredged this species frequently 

 in the Firth — in Aberlady Bay, 9 

 fathoms; west of Inchkeith, 5 to 7 

 fathoms, etc. 



Myid^. 



My a arenaria (Linn.). 



Firth of Forth {MB., Ed. Mus., and F. and 



H.) ; Bass Eock, 24 fathoms {Metz. and 



Mey.) ; Granton, living at low water west 



from Leith pier (M.). 



We have found this species in Largo Bay. 

 M. arenaria, var. lata. 



Biel sands, Longniddry, and Newhaven. 



Eather common in west harbour, Granton, 



(M.). 



We have found this variety at Aberdour. 

 M. truncata (Linn.). 



Firth of Forth, from low water to 



7 fathoms {F. and H.) ; Firth of Forth 



{M'B). Living at Granton, Craigroyston, 



and Cramond Island {M.). 



We have found this species at Portobello, 



and have dredged it in 4 fathoms, to the 



west of Inchkeith. 

 M. hinghami (Turt.). 



Firth of Forth {F. and R., and M'B.). 



SAXICAVIDiE. 



Saxicava rugosa (Linn.). 



Firth of Forth (MB.) ; Firth of Forth, 



7 fathoms {F. and H). 



Taken living, and apparently at home, 

 \ in pure sand, between Granton and 



Cramond Island {M). 



This species is very common from the 



