who suggested and made possible the expedition; Dr. Enrique 
Beltran, of the Secretaria de Agricultura y Ganaderi in Mexico 
City, who so wholeheartedly supported our objectives before the 
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* -i* r 
Mexican authorities; Pablo Bush Romero, who introduced us to 
Admiral Armando Canizares , chief of the naval district embracing 
Quintana Roo , who in turn gave us much more useful information 
about local weather conditions and navigational hazards; Mr. 
Neil L. Parks, our ever-helpful Consul in Merida; Dr. Raymund 
Zwemer , former Deputy Science Advisor to the Department of State 
in Washington; and last, but not least, throughout the voyage, 
my ever- industrious , cooperative, and congenial fellow members 
of the scientific staff of the expedition. We are also deeply 
to our Embassy staff in Mexico City, to the Federal Government 
of Mexico, to many of the residents of Isla Cozumel, particularly 
Father James Nagle, S.J., who interested the boys in his school 
in securing small stingrays in quantity needed by Dr. Daiber for 
his elasmobranch studies. 
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and to Mr. Robert S. Fuller, of Grand Cayman, a correspondent 
of the Museum, whose ’’Shell Shack Museum" we visited and who 
took us on one last collecting excursion before we left the 
is land. 
Photographs here reproduced were taken mostly by Dr. Daiber, 
and in smaller part by Dr. Clarke and myself. 
