Pp. xii, 500, 403 color photos, 218 text-figures (line-drawings), 188 maps. Publisher"s original brown cloth, lettered in gilt on the spine, color pictorial dust jacket, 4to. Presents a description of the environment and habitats of the Yucatán Peninsula, followed by descriptions of the 182 species of frogs, toads, salamanders, snakes, lizards, turtles and crocodiles. The features that distinguish each species from its sister species are detailed. No ownership marks.