MONOGRAPH 



ON THE 



BRITISH FOSSIL 



ECHINODERMATA 



TEOM 



THE CRETACEOUS FORMATIONS. 



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



VICE-PRESIDENT OF THE PAL«ONTOGBAPHICAL SOCIETY; CORRESl'ONDING MEMBER OF THE ROTAL SOCIETY OE SCIENCES 



OF LIEGE; THE SOCIETY OF NATURAL SCIENCES OP NEUCHATEL; VICE-PRESIDENT OF THE COTTESWOLD 



naturalists' field CLUB; CONSULTING SURGEON TO THE CHELTENHAM HOSPITAL; 



AND MEDICAL OFFICER OF HEALTH TO THE URBAN SANITARY DISTRICTS 



OF CHELTENHAM, CHAELTON-KINGS, AND LECKHAMPTON. 



VOLUME FIRST. 



PART EIGHTH. 

 ON THE SPATANGID^ AND ECHINOCORID^. 



Pages 265—300 ; Plates LXIIa, LXIII— LXIX. 



LONDON; 



PRINTED FOR THE PAL^EONTOGRAPHICAL SOCIETY. 



1878. 



