THESAURUS CONCHYLIORUM, 



MONOGRAPHS 



OP 



GENERA OF SHELLS. 



EDITED BY 



G. B. SOWEEBY, P.L.S. 



Efoision of iVIbllugts 

 Sectional Library 



VOL. IV. 



LONDON: 

 SOWERBY, 45 GREAT RUSSELL STREET, BLOOMSBURY. 



1880. 



