A handsome, comprehensive guide to 120 species of whales, dolphins, seals, walruses, sirenians, polar bears and their kin worldwide. Each species gets a four-page spread with excellent color photographs, a double-page full color painting, and a good overview of the animal, range, habitat, behavior, status and conservation. With range maps, checklists by region, an illustrated glossary and introductory chapters.  (FG58, $26.95)