Hlemorrs of the Museum of Comparative Zoologn 
AT HARVARD COLLEGE. 
iWon. XGXeXhxX.” Nos dt: 
REPORTS ON THE SCIENTIFIC RESULTS OF THE EXPEDITION TO THE 
TROPICAL PACIFIC, IN CHARGE OF ALEXANDER AGASSIZ, BY THE 
U. S. FISH COMMISSION STEAMER ‘“ ALBATROSS,” FROM AUGUST, 
1899, TO MARCH, 1900, COMMANDER JEFFERSON F. MOSER, U.S. N., 
COMMANDING. 
xT, 
ECHINI. 
THE GENUS COLOBOCENTROTUS. 
By ALEXANDER AGASSIZ. 
WITH FORTY-NINE PLATES. 
[Published by Permission of Gzorce M. Bowers, U. S. Commissioner of Fish and Fisheries.] 
CAMBRIDGE, U.S. A.: 
Printed for the Museum, 
NovemBer, 1908. 
