BRITISH CONCHOLOGY, 



OR AN ACCOUNT OF 



THE MOLLUSCA 



WHICH NOW INHABIT THE BRITISH ISLES AND THE 



SURROUNDING SEAS. 



VOLUME IV. 



MARINE SHELLS, 



IN CONTINUATION OF THE GASTROPODA AS PAR AS 



THE BULLA FAMILY. 



By JOHN GWYN JEFFREYS, F.R.S., F.G.S., &c. 



LONDON: 

 JOHN VAN VOORST, PATERNOSTER ROW 



MDCCCLXVU. 



[ The right of Tranalaion it reserved . ] 



