The taxonomic value of adult laryngeal and larval buccopharyngeal characters, not previously used in studies of southern African frogs, was investigated. The amphibians of Natal, recently examined using more traditional characters (Lambiris 1989), were used both for assessing the value of these characters and for testing the earlier taxonomic conclusions. The results indicate that: (a) Laryngeal and buccopharyngeal characters appear to be of value in anuran taxonomy; (b) Most of the taxonomic conclusions of Poynton (1964) and of Lambiris (1989) appear to be justified; (c) Taxonomic problems in certain of the genera and species-groups examined appear to be more easily resolved by the use of these characters than by those more generally used. The status of six taxa has been redefined; these are Bufo pusillus, Bufo poweri, Bufo cruciger, Breviceps maculatus, Rana umbraculata and Cacosternu striatum. Five undescribed species and one new genus have been identified and await description. / Thesis (Ph.D.)-University of Natal, 1991.