AMERICAN SAU 
Vou. 13 | ApH a! 1993!" No. 7 
JOURNAL 
OF THE 
WASHINGTON ACADEMY 
OF SCIENCES 
BOARD OF EDITORS 
Smpnny Parcs E. D. WILuIAMson E. P. Kiuurp 
GEOLOGICAL SURVEY GEOPHYSICAL LABORATORY NATIONAL MUSEUM 
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BOTANICAL SOCIETY ENTOMOLOGICAL SOCIETY 
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BIOLOGICAL SOCIETY 
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PHILOSOPHICAL SOCIDTY 
GEOLOGICAL SOCIETY 
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ANTHROPOLOGICAL SOCIETY 
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