advice and assistance. Also, George H. Gibson and Leslie J. Baker of 

 W. J. German, Inc. Tiieir help has been invaluable. 



Johnson Motors Company for their contribution to the equipment of 

 the expedition, their interest and their appreciation of the research to be 

 undertaken by the expedition. 



The Cortland Line Company, Gladding Line Company, Gudebrot 

 Brothers Company, and the Ashaway Line & Twine Manufacturing Com- 

 pany, for supplying fishing lines. 



The Bendix Company for instruments, advice and cooperation in con- 

 nection with electrical installations aboard the Explorer. 



International Petroleum Company, for facilitating arrangements for oil 

 and fuel supplies in Central and South American countries, and as hosts of 

 the expedition during the stay in Talara. 



Richard F. Kelly of Amrocta Company, for making contacts and expe- 

 diting the movement of equipment. 



Lobitos Oil Company, for the use of their dock at Cabo Blanco and for 

 anchorage. 



Assistance and scientific cooperation in the field work is acknowledged 

 elsewhere in the text. 



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