MONOGRAPH 



on THE 



BRITISH FOSSIL 



ECHINODERMATA 



FKOM 



THE CRETACEOUS FORMATIONS. 



BY 



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



CORRESPONDING MEMBER OF THE KOTAi SOCIETY OF SCIENCES OF LIEGE, THE SOCIETY OF NATURAL SCIENCES OF 



NEUFCHATEL; PRESIDENT OF THE GEOLOGICAL SECTION OF THE BRITISH ASSOCIATION, 1875 ; VICE-PRESIDENT 



OF THE COTIESWOLD NATURALISTS' FIELD CLUB ; CONSULTING SURGEON TO THE CHELTENHAM 



HOSPITAL; AND MEDICAL OFFICER OF HEALTH FOR THE URBAN SANITARY DISTRICTS 



OF CHELTENHAM, CHARLTON-KINGS, AND LECKHAMPTON. 



VOLUME FIRST. 



PART SEVENTH. 



ON THE ECHINOCONID^, ECHINONID^, ECHINOBRISSID^. 

 ECHINOLAMPID^, AND SPATANGID.^. 



Pases 225—264 ; Plates LIII— LXII. 



LONDON: 



PRINTED FOR THE PALJIONTOGRAPHICAL SOCIETY. 



1875. 



