MONOGRAPH 



OF THE ^ ^ 



LAND & FRESHWATER 

 MOLLUSC A 



OF THE 



BRITISH ISLES. 



JOHN W. |AYLOR, 



MEMBRE HONORAIEE DE LA SOCIETE MALACOLOGIQUE DE FEANCE, 



EX-PKESIDENT OF THE CONCIIOLOGICAL SOCIETY OF GREAT BRITAIN AND IRELAND, 



LATE EDITOR OF THE "JOURNAL OF CONCHOLOGY" ; ETC. ; 



WITH THE ASSISTANCE OF 



W. DENISON ROEBUCK, F.L.S., THE LATE CHARLES ASHFORD, 



AND OTHER WELL-KNOWN CONCHOLOGISTS. 



TESTACELLIDJE. 

 LIMACID^. 



ARIONID^. 



LEEDS : 

 TAYLOR BROTHERS, PUBLISHERS. 



1907. eii. 



