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/iDemoirs of tbe /iDuseum of Comparative Zooloov? 
AT HARVARD COLLEGE. 
Vol. XLTI. 
REPORTS ON THE SCIENTIFIC RESULTS OF THE EXPEDITION TO THE 
EASTERN TROPICAL PACIFIC, IN CHARGE OF ALEXANDER AGASSIZ, 
BY THE U. S. FISH COMMISSION STEAMER “ALBATROSS,” FROM 
OCTOBER, 1904, TO MARCH, 1905, LIEUT. COMMANDER L. M. GARRETT, 
U. S. N., COMMANDING, AND OF OTHER EXPEDITIONS OF THE “ALBA- 
TROSS,” 1891-1899. 
XXIX. 
THE SPONGES. 
3. HEXACTINELLIDA. 
By ROBERT VON LENDENFELD. 
WITH ONE HUNDRED AND NINE PLATES. 
TEXT. 
fPublished by permission of Hugh M. Smith, U. S. Commissioner of Fish and Fisheries]. 
CAMBRIDGE, U. S. A.: 
IPrluteD for tbe /IDuseum 
June, 1915. 
