290 SMART AND COOKE : MARINE SHELLS OF SCILLY. 



found under stones on St. Martin's Flats, but never 

 common. 



Loripes lacteus L. — A few specimens from St. Martin's 

 Flats, but never taken alive. 



L. divaricatus L. — Single, but fresh valves, not uncommon in 

 S — 10 fms. muddy sand. Crow Sound. The occurrence of 

 this shell in a new but unquestionable British locality, is 

 very interesting. It is true that no living specimens were 

 discovered, but many of the valves were undoubtedly fresh, 

 and we have no doubt that by persistent dredging living 

 specimens would eventually be procured. The ligament in 

 this subgenus of Liicina is extremely frail, which will account 

 for no double shells occurring ; the same was the case with 

 Axitius fiexuosiis which occurred on the same ground, in 

 quantity, and of which only one living specimen was 

 obtained in many hauls of the dredge. We were generally 

 tolerably sure of at least one valve of Z. divaricatus to every 

 haul. 



Lucina borealis L.— Exceedingly common on St. Martin's 

 Flats, fine large specimens ; also dredged outside Menavawr. 



Axinus flexuosus Mont. — Crow Sound in 8 — 10 fms. muddy 

 sand ; living specimens very rare, valves exceedingly 

 common. 



Diplodonta rotundata Mont. — A few specimens on St. 

 Martin's Flats, dead but perfect. 



Cardium echinatum L. — Dredged living in Crow Sound, 

 but only young specimens : not as yet found full-grown 

 except in fragments. 



C. fasciatum Mont. — From the Menavawr dredgings; not 

 common. 



C. nodosum Turt. — With C. fasciatum, but more abundant, 

 and frequently living. 



C. edule L. — Sandy bays and flats everywhere ; raked out of 

 the sand by the inhabitants for food. 



Cardium edule var. crenulata L. — A form approaching this 



J.C, iv;, April, 1885. 



