284 Proceedings of the Royal Physical Society. 



chiefly single valves, but sometimes a 

 perfect specimen (if.)- 

 We have collected this species at Aber- 

 dour, etc. 



Carditid^. 



Cyamium minutum (Fabr.). 



Living among small seaweeds in rock 

 pools, etc., at North Berwick and Dun- 

 bar. Very common at the Isle of May. 

 A clear white form is rare at North 

 Berwick (if.). 



Caediid^. 



Cardium echinatum (Linn.). 



Firth of Forth {M'B., and Ed. Mils.) ; Bass 

 Eock, 24 fathoms, and St Abb's Head 

 40 fathoms {Metz. and Mey). 

 Taken alive between Granton and Cramond 

 Island. Specimens with the prickles worn 

 smooth are not uncommon, and bear a 

 great resemblance to C. tuber culatnm, and 

 have been mistaken for it. Good prickly 

 specimens are frequent in Newhaven Har- 

 bour, brought in by the fishermen. Single 

 valves occur along the whole coast (if). 

 This species is not uncommon in the Firth. 

 We have dredged it off Longniddry, in 7 

 fathoms; west of Inchkeith, in 12 fathoms; 

 and have collected it on the beach at 

 Largo and Portobello. 



C. fasciatnm (Mont.). 



We have a specimen of this species from 

 Elie. 



C. edule (Linn.). 



Firth of Forth (if A, cmd Ed. Mus). 

 This species is common. We have taken 

 it at Cramond, Newhaven, Elie, North 

 Berwick, Aberdour, etc. 



