a 
Hemoirs of the Museum of Comparative Zoology 
AT HARVARD COLLEGE. 
VoL. XXI. 
THE NORTH AMERICAN 
CRINOIDEA CAMERATA. 
By CHARLES WACHSMUTH anp FRANK SPRINGER. 
IN TWO VOLUMES WITH EIGHTY-THREE PLATES. 
Vou. II. 
CAMBRIDGE, U.S. A.: 
Wrinted for the fAuseum. 
May, 1897. 
