No previous attempt has been made to produce a complete list of the amphibians and reptiles of Cuba with descriptions of the species. It should be expressly understood that the senior author is responsible for the actual writ ing of this paper, for the nomenclature, and taxonomic descriptions, and the junior author has contributed many details of distribution and notes upon habits and habitats; his work has been chie?y in the Guantanamo Basin; and of this region he has the intimate knowledge which only long residence can give. The senior author besides having been privileged to collect with his associate upon Monte Libano, and elsewhere about Guantanamo, has visited various chosen localities in all of the other provinces, usually several times. Thus one or other of the writers has himself collected, with a few exceptions, every defi nitely known Cuban reptile or amphibian. In 1880 Gundlach published his classic Erpetologia Cubana in Havana and in the natural course of events many changes have taken place since that time which have affected the nomenclature and status of the species treated, while new forms have been discovered.