A MONOGRAPH 



BRITISH SPONGUD^. 



BT THE LATE 



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



EDITED, WITH ADDITIONS, BT THE 



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



VOL. IV 



( SUPPLEMENTARY). 



LONDON: 

 PEINTED FOE THE EAY SOCIETY. 



MDCCCLXXXII. 



