The Catalogue consists of accounts of taxa prepared by specialists, including synonymy, description, diagnosis, phylogenetic relationships, published descriptions, illustrations, distribution map, and comprehensive list of literature for each taxon. The series covers amphibians and reptiles of the entire Western Hemisphere. This set consists of accounts 821 to 840 and is a collection of 20 hole-punched, loose-leaf separates. It describes 10 amphibian species (Bolitoglossa carri, Bolitoglossa longissima, Bolitoglossa synoria, Stefania ackawaio, Stefania ayangannae, Stefania coxi, Stefania evansi, Stefania roraimae, Stefania woodleyi, and Leptodactylus fragilis), and 10 reptile species (Trachemys scripta, Trachemys venusta, Caiman latirostris, Celestus montanus, Sceloporus cautus, Sceloporus halli, Sceloporus megalepidurus, Geophis dunni, Geophis fulvoguttatus, and Crotalus ruber).