490 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.39. 



Save for a few footprints discovered in 1849 by Lea in the coal 

 measures of Pennsylvania the specimens above mentioned were the 

 only evidences or suggestions of labyrinthodonts from the coal meas- 

 ures of North America until the year 1875, when Cope °' described 

 a fragmentary skull from the coal measures of Linton, Ohio, as 

 Tuditanus Jiuxleyi. The present writer,'' in 1909, restudied the type 

 of this species and placed it in a new genus, Macrerpeton, and suggested 

 the labyrinthodont nature of the species, though the evidence was 

 somewhat imperfect. Later in the same year he described and fig- 

 ured a large rib of undoubted labyrinthodont nature from the coal 

 measures of Linton, Ohio, and located it tentatively with the frag- 

 mentary skull in the species Macrerpeton huxleyi (Cope).'' 



No further discoveries were made in the coal measures for more 

 than twenty years. In 1897 Doctor Williston described and figured 

 a typical labyrinthodont tooth from the coal measures of Kansas. 

 He compared this tooth, which had been found near Louisville, 

 Kansas, by Herbert Bailey, with the teeth of Mastodonsaurus from 

 the Trias of Germany, but was unable to detect characters in the 

 tooth and few bone fragments he possessed which would distinguish 

 the Kansas Carboniferous form from the European Triassic genus, 

 so he located it tentatively in Mastodonsaurus. 



The present specimens, described below as a new genus and species, 

 represent the fifth or possibly the sixth discovery of labyrinthodont- 

 like remains in the coal measures of this continent. The exact locality 

 from which the specimens came is not known. They were secured 

 some two or three years ago by the U. S. National Museum with the 

 (Gustav) Hambach collection, so I am told by Mr. C. W. Gilmore, 

 through whose courtesy the specimen was first called to my attention 

 and subsequently loaned me for study. On a slip of paper accom- 

 panying the specimens was written in pencil, evidently by Mr. Ham- 

 bach, "Coal Measures, Washington Co., Kansas." 



In the recently published geological map of Kansas'^ no coal- 

 measure deposits are indicated in Washington County, but they 

 outcrop at the fork of the Blue River in Marehall County near Marys- 

 ville, and since the topography of the region is quite rough, as shown 

 by the Washington and Marysville topographic sheets, and especially 

 since there is an antichne reported to occur running northeast- 

 southwest near Marysville, coal-measure deposits might very readily 

 be expected to occur in the eastern edge of Washington County near 

 the banks of the Little Blue River or its tributaries. 



oGeol. Surv. Ohio, vol. 2, pt. 2, p. 397, pi. 34, fig. 2. 

 ftJourn. Geol., vol. 7, no. 1, p. 72, fig. 17. 

 cProc. U. S. Nat. Mus., vol. 37, p. 28, pi. 8, fig. 4. 

 dGeol. Surv. Kans., vol. 9, 1908. 



