JUN a 1927 
Icmoirs of i\n ||lus£um of Comparatibc ^ooloc];n 
AT HARVARD COLLEGE. 
Vol. X. No. 1. 
R E P O E T S 
ON THE 
RESULTS OF DREDGING, 
UNDER THE SUPEETISION OP 
ALEXANDER AGASSIZ, 
IN THE GULF OF MEXICO (1877-78), IN THE CARIBBEAN SEA (1878-79), AND 
ALONG THE ATLANTIC COAST OF THE UNITED STATES (1880), 
U. S. COAST SURVEY STEAMER "BLAKE," 
LlEUT.-COM. C. D. SiGSBEE, U. S. N., AND CoMMANDER J. R. BaRTLETT, U. S. N., COMMANDING. 
XXIV. Part I. 
Report on the Echini. By Alexander Agassiz. 
(Publislieil by permission of Carlile P. Patterson ami J. E. Hilgard, Superintendents 
U. S. Coast and Geodetic Survey.) 
WITH THIRTY-TWO PLATES. 
CAMBRIDGE: 
PrmtelJ for tlje JHuseum. 
September, 1883. 
