A MONOGRAPH 



ON THE 



BRITISH FOSSIL 



ECHINODERMATA 



FROM 



THE OOLITIC FORMATIONS. 



BY 



THOMAS WRIGHT, M.D., F.R.S.E., • E.G.8., 



COKRESPONDING ilEMBER OF THE ROYAL SOCIETY OF SCIENCES OF hTEG¥,, 

 AND SENIOR SURGEON TO THE CHELTENHAM HOSPITAL. 



VOLUME SECOND. 



PART FIRST. 

 ON THE ASTEROIDEA. 



LONDON: 



PRINTED FOR THE PAL^ONTOGRAPHICAL SOCIETY. 



1862. 



