A MONOGRAPH 



ON THE 



BRITISH FOSSIL 



ECHINODERMATA 



FROM 



THE CRETACEOUS FORMATIONS. 



VOLUME SECOND. 

 THE ASTEROLDEA AND OPHIUEOIDBA. 



BY 



W. PERCY SLADEN, F.L.S., F.G.S., 



AND 



W. K. SPENCER, B.A., F.G.S. 



LONDON: 



FEINTED FOE THE PAL^EONTOGEAPHICAL SOCIETY. 



18911908. 



