/ ^7 

 b 



A MONOGRAPH 



OF TI1K 



RITISH SPONGUDJE. 



BY THE LATE 



J. S. BOWERBANK, LL.D., P.R.S., &c. 



EDITED, WITH ADDITIONS, BY THE 



REV. A. M. NORMAN, M.A., F.L.S., &c. 



VOL. IV 



( SUPPLEMENTARY). 



LONDON: 

 PRINTED yOR THE EAY SOCIETY. 



MDCCCLXXXII. 



