A MONOGRAPH 



ON THE 



BRITISH FOSSIL 



ECHINODERMATA 



FROM 



THE OOLITIC FORMATIONS. 



BY 



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



CORRESPONDING MEMBER OF THE ROYAL SOCIETY OF SCIENCES OF LIEGE, 

 AND SENIOR SURGEON TO THE CHELTENHAM HOSPITAL. 



VOLUME SECOND. 



PART FIRST. 

 ON THE ASTEUOIDEA. 



LONDON: 

 PRINTED FOR THE PALiEONTOGRAPHICAL SOCIETY. 



1862. 



