MONOGRAPH 



ON THE 



BRITISH FOSSIL 



ECHINODERMATA 



FBOM 



THE CRETACEOUS FORMATIONS. 



Br 



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



VICE-PRESIDENT OF THE PALjEONTOGRAPHlCAL SOCIETY; CORKESPONDING MEMBER OF THE EOYAl. SOCIETY 01' SCIENCES 



OF LIEGE; THE SOCIETY OF NATURAL SCIENCES OF 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, CHARLTON KINGS, AND LECKHAMPTOK. 



VOLUME FIRST. 



PART NINTH. 

 ON THE ECHINOCORID^. 



Pages 301—324 ; Plates LXX— LXXV. 



LONDON: 



PRINTED FOR THE PAL^ONTOGRAPHICAL SOCIETY. 



1881. 



