R. Glenn Northcutt, Ph.D. 
Division of Biological Sciences 
University of Michigan 
Ann Arbor, Michigan 48104 
Ellengene Peterson, Ph.D. 
Division of Biological Sciences 
University of Michigan 
Ann Arbor, Michigan 48104 
A. Stanley Rand, Ph.D. 
Smithsonian Tropical Research Inst. 
P.O. Box 2072 
Balboa, Canal Zone 
Philip J. Regal, Ph.D. 
Museum of Natural History 
University of Minnesota 
Minneapolis, Minnesota 55455 
Rudolfo Ruibal, Ph.D. 
Department of Zoology 
University of California 
Riverside, California 92502 
Philip S. Ulinski, Ph.D. 
Department of Anatomy 
University of Chicago 
1025 East 57th Street 
Chicago, Illinois 60637 
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