In 1955 Professor Robert Mertens published his important work on the herpetology of South West Africa thereby condensing all known information about this area into a single volume which greatly facilitated further investigation. With the aid of this publication and other monographs, such as FitzSimons' "The Snakes of Southern Africa" (1962) and Poynton's "The Amphibia of Southern Africa: a faunal study" (1964), it has been possible to add a number of new records to the existing check list, thereby proving that the vast expanses of South West Africa, with its variety of biotopes, are still not completely explored from the biological point of view. This paper adds another eleven species and forms, previously only known from neighbouring territories, to the already impressive list of species and subspecies. A number of these forms were obtained in the border areas which had hitherto been rather poorly collected. These finds, in some instances, provide further proof that the perennial border rivers, the Orange, Kunene and Okavango, are not important as zoogeographic barriers. In the case of Amphibia, they are actually distribution routes for species relying on permanent water. Keywords: Amphibia, Herpetology, New records, New species, Reptilia, South West African snakes.