A NEW BATRACHIAN AND A NEW REPTILE FROM THE 

 TRIAS OF ARIZONA. 



By Frederic A. Lucas, 



Acting Curator, Section of Vertebrate Fossils. 



The two species of fossil verteln-ates to be described add two genera 

 to the Triassic fauna of North America, one representing the large 

 labyrinthodonts hitherto known only from Europe, the other being a 

 new and hirge Cot^dosaurian. The history of the discovery of these 

 vertebrates is as follows: 



In November, 1899, while visiting the fossil forest of Arizona, 

 Dr. Lester F. Ward obtained near Tanners Crossing of the Little 

 Colorado River a few specimens of Triassic vertebrates. The majorit}' 

 of them proved to belong to the large belodont described as Iletero- 

 chmtosuehus ganei" two scutes were fi'om the belodont Eji^'scopomuras 

 Cope, while a small portion of a cranial plate was identitied b}- Dr. E. 

 ' Fraas as being from some large labyrinthodont. The subsequent year, 

 1900, Mr. Barnum Brown visited the locality to collect for the U. S. 

 National Museum, largely in the hope of obtaining some ancestral forms 

 of Stegosaurus. While this hope was not realized Mr. Brown secured 

 a valuable collection of Triassic fossils, mainly belonging to the two 

 bolodonts mentioned above, though comprising a few examples of other 

 animals. This material was mostly in a very fragmentary condition, 

 on(> of the few noteworthy exceptions to this rule being an epistenuun 

 of a large labyrinthodont, whicli, though badly shattered, proved to be 

 practically all present. This was pronounced l)y Dr. E. Fraas, to 

 whom a photograph was su))mitted, to ])e unmistakably from some 

 species of the genus Jlt'tnp'miuf'ff.s, and in consideration of this fact I 

 have named the species in his honor. This seems particularly appro- 

 priate in view of his various memoirs on the Triassic vertebrates of 

 Europe. 



"Am. Journ. Soi., 1898, VI, p. 399. 



Proceedings U. S National Museum, Vol. XXVII— No. 1353. 



193 



