MONOGRAPH 



BRITISH FOSSIL 



ECHINODERMATA 



FROM 



THE CRETACEOUS FORMATIONS. 



BY 



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



COBBESPOSDING MEMBEK OF THE KOYAl SOCIETY OF SCIEKCES OP LIEGE, THE SOCIETY OF 

 NATTIBAi SCIENCES OP NEUPCHATEL; SENIOR SUEGEON TO THE CHELTENHAM 

 HOSPITAL; AND MEDICAL OPPICER OF HEALTH FOB, THE UBBAN 

 SANITARY DISTRICTS OF CHELTENHAM, CHARLTON- 

 KINGS, AND LECKHAMPTON. 



VOLUME FIRST. 



PART SIXTH. 

 ON THE ECHINOCONID^. 



Pages 185—224 ; Plates XLV— LII. 



LONDON: 



PRINTED FOR THE PAL^ONTOGRAPHICAL SOCIETY. 



1874. 



