382 E.-L. Troxell — Entelodonts in Marsh Collection. 



On the anterior wall of the temporal is a very large 

 foramen which occurs doubled in the type of A. eras sum. 



The occipital condyle is not long but is thick vertically, 

 and on its upper side the articular surface has a distinct 

 edge ; above it there is a slight depression within which 

 opens a foramen. A unique feature is to be seen in the 

 posterior ending of the maxillary in a very thin process 

 inclosing between it and the pterygoid process of the pala- 

 tine, a post-palatine foramen. The maxillary at the 

 suture with the malar is strongly convex; this is in har- 



Fig. 11. — Archceotherium marslii, sp. nov. Holotype. Cat. No. 12025. 

 Palatal view of skull. Note the teeth marks on the tip of the left dependent 

 process. About one-fifth nat. size. 



mony with the general heavy structure. The alveolar 

 border is very shallow and the palate and the palatine 

 processes of the premaxillaries, forming the roof of the 

 mouth, are broad and flat. The molar series is crushed 

 in, closing the area of the hard palate about 20 mm. on 

 one side. 



The orbit is bounded above by a narrow rim beyond 

 which there is a small depression. In the frontal here, 

 there are many longitudinal folds, and the boundary with 

 the parietal is marked by a strong ridge which leads to the 



