Proceedings of the Boston Society of Natural History. 
VOL. 29, No. 15, 
pp. 323-387. 
ECHINOPERMS FROM PUGET SOUND: OBSERVATIONS MADE ON 
THE ECHINODERMS COLLECTED BY THE PARTIES FROM 
COLUMBIA UNIVERSITY, IN PUGET SOUND 
IN 1890 AND 1897. 
By Hubert Lyman Clark. 
WITH FOUR FLATUS. 
BOSTON: 
PRINTED FOR THE SOCIETY. 
May, 1901. 
