Numbers of the BULLETIN OF THE FLORIDA STATE MUSEUM, BIOLOGICAL SCIENCES, are published at irregular intervals. Volumes contain about 300 pages and are not necessarily completed in any one calendar year. S. DAVID WEBB, Editor RHODA J. BRYANT, Managing Editor Communications concerning purchase or exchange of the publications and all manuscripts should be addressed to: Managing Editor, Bulletin; Florida State Museum; University of Florida; Gainesville FL 32611; U.SA. This public document was promulgated at an annual cost of $1587.50 or $1.588 per copy. It makes available to libraries, scholars, and all interested persons the results of researches in the natural sciences, emphasizing the circum- Caribbean region. ISSN: 0071-6154 CODEN: BF5BA5 Publication date: September 11, 1989 Price: $1.75