'0.1 . 



HUnwirs of % Ufasaxm of Cmngaralifo loo'lmgo 



AT HARVARD COLLEGE. 



Eighty-Three Plates to Accompany. 



Vols. XX. and XXI. 



THE NORTH AMERICAN 



CRINOIDEA CAMERATA. 



By CHARLES WACHSMUTH and FEANK SPEINGEE. 



EIGHTY-THREE PLATES. 



CAMBRIDGE, U.S.A.: 



^rintrti far ttjc museum. 



May, 1897. 



