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The type specimen of Pelobates decheni Troschel, 1861, from Rott near Bonn, has been reinvestigated and described. It is shown to be identical with the type (and only) specimen ofZaphrissa eurypelis Cope, 1866, described from the same locality. The latter name thus must be regarded as a junior synonym of the former. This also implies the reassignment of Zaphrissa from Discoglossidae to Pelobatidae. Some unique plesiomorphic characters of P. dechen i not known in Recent frogs are pointed out.

In the paleontological collections of the Rheinische Friedrich-Wilhelms-Universität of Bonn, F. R. G., the ventral counter-impression of the holotype of Eopelobates anthracinus Parker, 1929 was found. This enabled us to complete the description of the whole specimen, as well as to give full diagnosis of the genus and species. Some doubts are expressed concerning the validity of Eopelobates bayeri as an independent species.

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