THE COMMERCIAL SPONGES AND THE SPONGE FISHERIES 
7d 
By H. F. Moore 
Scientific Assistant, United States Bureau of Fisheries 
&* 
Paper presented before the Fourth International Fishery Congress 
held at Washington, U. S. A., September 22 to 26, 1908, and 
awarded the prize of one hundred dollars in gold offered by John K. 
Cheyney for the best presentation treating of the methods of the 
sponge fisheries, the influence of such methods on the supply of sponges 
and the most effective means of conserving the sponge grounds 
399 
