THESAURUS CONCHYLIORUM, 



OR 



MONOGRAPHS DrrisioTi oi J^^^Jf^ 



OF 



GENERA OF SHELLS. 



EDITED BY 



G. B. SOWEEBY, F.L.S. 



VOL. IV. 



LONDON: 

 SOWERBY, 45 GREAT RUSSELL STREET, BLOOMSBURY. 



1880. 



