THE TEMNOSPONDYLOUS AMPHIBIA. 



191 



as in Aiiaschisma and other labyrinthodont genera. The splenial is a small, slender 

 element located farther forward, where it has been shoved by the large-sized internal 

 mandibular foramina. The prearticular is a rather long, broad element, of which 

 only a portion is preserved. I am not sure as to the location of the suture for the 

 dentary, unless it is represented by the line bounding the roughened area near the 

 teeth. If this is true, the dentary is a large element, since it extends well down upon 

 the outer side of the jaw. The dentary possesses evidences of 26 teeth, a few of 

 which are completely preserved. Most of them are, however, represented either 

 by bases or by impressions in the coal. The teeth are very similar to those of the 

 maxilla, though slightly larger. The characters given for the maxillary teeth will 

 suffice for those of the dentary. 



FIG. 42. 



A. Outer view of mandible of Eobaphetes kansensis Moodie, from the Coal 



Measures of Washington County, Kansas. Original in U. S. National 

 Museum. X 0.33. Cat. No. 6680. a, angular; r, articular; </, dentary. 



B. Portion of skull of Eobaphe/es kansensis Moodie, from the Coal Meas- 



ures of Washington County, Kansas. Original in U. S. National 

 Museum. Cat. No. 6699. X 0.33. Lateral-line canal represented by 

 heavy broken line, it, nasal; m, maxilla. 



C. Inner surface of mandible of Eobaphetes kansensis Moodie, from the 



Coal Measures of Washington County, Kansas. X 0.33. a, angular; 

 p, prearticular; r, articular; s, splenial. 



The markings of the inner surface are as indicated in the drawing. The back 

 portion of the angular shows a few radiating lines. The dentary is roughened in two 

 portions: one near the teeth, the other at the tip, where there is a cartilaginous 

 roughening for union with its mate. The remainder of the inner surface is relatively 

 smooth. 



The outer surface shows at the anterior end the typical labyrinthodont sculptur- 

 ing, which becomes slight grooves and ridges posteriorly. I detect evidences of the 

 operculo-mandibular lateral-line canal throughout the entire length of the mandible. 

 Its location is indicated by the heavy broken line. The suture between the dentary 

 and angular is quite clear. The suture separating the dentary and splenial joins 

 the angular suture about midway of the length of the jaw. 



MEASUREMENTS OF SKULL FRAGMENT OF EOBAPHETES KANSENSIS MOODIE. 

 (Cat. No. 6699, U. S. Nat. Mus.) 



Total length of portion preserved 109 



Maximum width of maxilla 45 



'I hickness of maxilla. . 



Length of tooth . . 10 



Width of tooth at base 4 



