Beautifully illustrated and authoritative, these four spiral-bound Galapagos field guides include Sea Stars and other Echinoderms, Marine Molluscs, Crustaceans, and Corals and other Radiates. Of interest to marine scientists, curious visitors, snorkelers and divers, each compact guide features color photographs, drawings and detailed species descriptions. Produced in collaboration with the Charles Darwin research Station and leading invertebrate specialists.  (GPS88, $75.00)