pateontoGvapbical Society 1907. 



A MONOGRAPH 



ON THE 



BRITISH FOSSIL 



ECHINODERMATA 



FROM 



THE CRETACEOUS FORMATIONS. 



VOLUME SECOND. 

 THE ASTEROIDEA AND OPHIUROIDEA. 



BY 



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



PART FOURTH. 



Pages 91—132; Plates XXVII— XXIX. 



LONDON: 



PEINTED FOR THE PAL^ONTOGRAPHICAL SOCIETY. 



1907. 



