U. S. GEOLOGICAL SURVEY 



PROFESSIONAL PAPER 91 PLATE VII 



A. HABITAT OF THE NIPA PALM, NIPA FRUCTICANS, LUZON, PHILIPPINE ISLANDS. 



Photo by Philippine Bureau of Science. 









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B. HABITAT OF THE BLACK MANGROVE, AVICENNIA NITIDA, PONCE, PORTO RICO. 



Photo by Marshall A. Howe. 



