HUmoirs of lljt Pustum of (Homparalik ^oblojgu 



AT HARVARD COLLEGE. 



ElGUTY-TuKEE PlATES TO ACCOMPANY. 



Vols. XX. and XXI. 



THE NORTH AMERICAN 



CRINOIDEA CAMERATA. 



By CHARLES WACHSMUTH and FRA^K SPRINGER. 



EIGHTY-THREE PLATES. 



CAMBRIDGE, U.S.A.: 



^Printcli for tl}c fHuscum. 



May, 1897. 



