foe 



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Zooi ^ 



[maxx^ of t^t Slttsmm of Comgaratxfe ^oirlogg 



AT HARVARD COLLEGE. 



Vol. XX. 



THE NORTH AMERICAN 



CRINOIDEA CAMERATA 



By CHAELES Wx^CHSMUTH and FEANK SPEINGEE. 



IN TWO VOLUMES WITH EIGHTY-THREE PLATES. 



Vol. I. 



CAMBRIDGE, U.S.A.: 



?3rtntetr for tlje JHugeum^ 



May, 1897. 



