A MONOGRAPH 



ON THE 



BRITISH FOSSIL 



ECHINODERM ATA 



THE OOLITIC FORMATIO^VS, 



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



COIIKESPOKDING MEMBEK OF IHE HOYAL SOCIETY OE SCIENCES OF LIEGE, THE SOCIETY OF 

 UATIIEAL SCIENCES OF NEUFCHATEt,, AND SENIOK SCEGEON TO 

 THE CHELTENHAM IIOSl'ITAL. 



VOLUME SECOND. 



PART SECOND. 

 ON THE OPHIUROIDEA, 



Pages 131— J 54; Plates XIII— XVIII. 



LONDON : 



PRINTED FOR THE PAL^OKTOGRAPHICAL SOCIETY. 



186G. 



