A collection of scholary review articles by leading experts, the 283 articles (varying from two columns to several pages) covers anatomy and physiology, behavior and life history, ecology and population biology, evolution and systematics, human effects and interactions, organisms and faunas, and research methodology. The alphabetically arranged entries are cross-referenced and contain color and b&w illustrations. Suitable for high school and college students, researchers, and the general public. Edited by Perrin (Southwest Fisheries Science Center, NOAA), Bernd Wnrsig (Texas A&M U.) and J.G.M. Thewissen (Northeastern Ohio Universities College of Medicine).  (NAT149, $180.00)