

6 1 

 A MONOGRAPH 



OF THE 



BRITISH SPONGIADJE, 



B5 



J. S. BOWERBANK, LL.D., 



F.K.S., F.L.Si, F.G.S., F.Z.S., F.H.A.S., 

 MKUBJSK Of THE ENTOMOLOGICAL SOCIETY OF LONDON; OF THE MICROSCOPICAL SOCIETY 



OF LONDON; CORRESPONDING MEMBER OF THE DUBLIN UNIVERSITY 



ZOOLOGICAL AND BOTANICAL ASSOCIATION; OF THE PLYMOUTH INSTITUTION, AND 

 DEVON AND CORNWALL NATURAL HISTORY SOCIETY, ETC., ETC. 



VOL. 1. 



LONDON: 



PUBLISHED FOR THE EAY SOCIETY BY 

 ROBERT HARDW1CKE, 192, PICCADILLY. 



MUUCCLXIV. 



