6o2 E. B. BRANSON 



most of them are distinct. In Figs. 13 and 13a the sutures are indi- 

 cated. The suture between the prearticular and the splenial has not 

 been definitely located. 



The articular is short and thick. It is covered on the outside 

 by the angular and surangular, and on the inside by the angular and 

 prearticular. The articular surface is convex, the convexity passing 

 diagonally forward from the posterior inner corner. The coronoid 

 is very small, and is situated in front of the supra-meckelian foramen, 

 as in Anaschisma. The dentary is slender, sculptured anteriorly, 



C Jk P 1 ' 2 ° S i° ? P 



Fig. 12. — Eryops Cope; hinder view of occiput, one-third natural size. 



c, condyle; eo, exoccipital; ep, epiotic; fm, foramen magnum; op, opisthotic; pt', posttemporal 

 foramen; pt, pterygoid; psq, prosquamosal; qj, quadratojugal; qu, quadrate. 



and smooth posteriorly. The posterior end of it projects a little way 

 behind the coronoid. There is a high, thin parapet on the upper 

 side of the outer part of the bone, and the outer edges of the teeth 

 are imbedded in it. The angular forms the greater part of the outside 

 of the mandible in front of the supra-meckelian foramen. The 

 suture between the angular and surangular has not been definitely 

 determined. The splenial is slender and very thin. It projects 

 above the inner edge of the dentary anteriorly, but gradually descends 

 posteriorly. The portion in front of the angular (Fig. 13, ?) seems 

 to be an element separate from the dentary. The suture between it 

 and the dentary appears to be near the lower edge of the jaw on the 

 outer side. As previously stated, this element seems to be distinct 

 in Anaschisma, but the evidence in neither case is conclusive. 



The internal mandibular foramen is small, oval, situated between 



