290 Proceedings of the 'Royal Physical Society. 



Mactra stidtorum, var. cinerea. 



Mouth of the Almond, etc. (if.). 



Littraria elliptica (Lamk.). 



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

 F. and H) ; Portobello (if.). 

 We have collected this species at Porto- 

 bello, and at Caroline Park. 



ScTohicularia prismatica (Mont.). 



Firth of Forth {F. and H.) ; off Elie {MB). 

 Occurs sparingly alive on the sands at very 

 low water between Granton and Cramond 

 Island, especially towards Cramond Island. 

 Empty shells, with the valves still united, 

 are a little commoner {M.). 

 We have found this species on the shore 

 west from Aberdour. 



>S^. nitida (MiiUer). 

 >S'. alha (Wood). 



St Abb's Head, 40 fathoms {Metz. and 

 Mey). 



Firth of Forth {Ed. Mus) ; Off Elie {MB). 

 Frequent at Portobello, etc., living at 

 low water, and on the beach brought up 

 by storms (if). 

 S. piper ata (Bellon.). 



Firth of Forth {F. and ff, and MB); 

 Caroline Park, shells well preserved, but 

 not living ; they are in a bed of blue clay 

 between tides {M). 



We dredged this species last summer in 

 5 fathoms, to the south-west of Inchkeith. 



SOLENID^. 



Solen pellucidus (Penn.). 



Firth of Forth {M'B., and Thomas and 

 Knapp) ; brought up by the tides between 

 Portobello and Leith, and between Granton 

 and Cramond Island, but not plentiful 

 {M) ; east of Inchkeith {J. Hnnter Bar- 



