

lNV2- 



S6 S.fj 



MONOGRAPH 



OK THE 



ECHINODERMATA 



or THE 



BRITISH TERTIARIES. 



BY 



PROFESSOR EDWARD FORBES, F.R.S., &c. 





^ 





LOiNDON: 

 PRINTED FOR THE PAL^EONTOGRAPHICAL SOCIETY. 



1852. 



