A MONOGRAPH 



ON THE 



BRITISH FOSSIL 



ECHINODERMATA 



b'liOM 



THE OOLITIC FORMATIONS. 



BY 



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



COKRESPONDING MEMBER OF THE ROYAL SOCIETY OF SCIENCES OF LIEGE, 

 AND SURGEON TO THE CHELTENHAM HOSPITAL. 



PART THIRD, 



CONTAINING 



THE COLLYRITIDiE, ECHINOBHISSIDiE, AND 

 ECHINOLAMPID^. 



LONDON : 



PRINTED FOR THE PAL^EONTOGRAPHICAL SOCIETY. 



1859. 



