Yale Peab0dy Museum

The original intention of this investigation was to determine the identity of Eobatrachus agilis Marsh. I t was soon evident to us, as to other workers, that the type materials represented more than one species. Fragments referred to this form by Moodie (1912, 1914) represent an ilium of a reptile, a femur of a salamander, an unidentifiable fragment of a tibiofibula of a frog and two distinctly different types of frog humeri. Unavailable to us at this time are the vertebra and urostyle illustrated but not discussed by Moodie (1914). Marsh (1887) described this form in the following words: "More recently, various bones of small, anourous amphibians (Eobatrachus agilis) have been found, the first detected in any Mesozoic formation." Moodie (1912) described Marsh's material and selected the larger humerus as the type (Yale Peabody Museum no. 1862). He stated that the elements represented a form close to Bufo and later (1914) actually placed it in the Bufonidae. Simpson (1926 a and b) merely records the presence of a modern frog in the fauna. The importance of these specimens is that the frog remains are among the oldest known and the salamander is the earliest record of that group. Appli-