MONOGRAPH 



or THE 



BRITISH NAKED-EYED MEDUSJl: 



JTiffures of all ti&c ^pewsf. 



EDWARD FORBES, f.R.S.; L.S.; and G.S. 



PBOPESSOK or BOTANY IN KING'S COLLEGE, LONDON ; 

 , AND PALAEONTOLOGIST TO THE GEOLOGICAL SUEVBY Or THE UNITED KINGDOM. 



LONDON : 

 PRINTED FOR THE RAY SOCIETY. 



MDCCCXLVIII. 



