EPORF.OnON 



67 



Specific Characters: The skull is somewhat smaller than that of E. facificus and more 

 brachycephalic. The zygomata are rather slender and rise gently posteriorly, with the maximum 

 expansion near the middle of the zygomatic foramen. The nasals are nearly flat, are posteriorly 

 obtuse, and are nearly uniform in width. The pars facialis of the lacrimal bone is moderately large, 

 with a fossa wholly confined to the lacrimal. This fossa is shallower and smaller than that of E. occi- 



11010, TYPE 

 Y. P. M. 



Fig. 31. — Eforeodon condoni Thorpe. Skull. HT. Cat. No. 11016 Y.P.M. 2/5 n.it. size. (After Thorpe, 1921.) 



dentalis. The frontals are medially depressed and strongly convex in the supraorbital area, and 

 their anterior termination is about on a line with the front of the lacrimal. The orbits are large and 

 look but very slightly forward. The temporal ridges join on a line about through the middle of 

 the glenoid surfaces. The sagittal crest is low and about one-fourth the length of the skull. The 

 supraoccipital crest is well produced aft, and the wings are widespread. The brain case is fairly well 

 developed, with a medium convexity along the suture. The external auditory meatus is good-sized 



I/OIC, TYPE 

 Y. P. M. 



Fic. 32. — Eforeodon condoni "Thorpe. Right half, superior view of skull. HT. Cat. No. 11016 Y.P.M. 2/5 nat. size. 



(After Thorpe, 1921.) 



Fig. 33. — Eforeodon condoni Thorpe. Right half, inferior view of skull. 



(After Thorpe, 1921.) 



HT. Cat. No. 11016 Y.P.M. 2/5 nat. size. 



and tubular in shape. The palate is narrow and concave, with the U-shaped palatonarial border 

 1 mm. posterior to the last molars. The basicranial axis has a medium inclination. The glenoid 

 articular surface is gently convex and rather small. The postglenoid process is stocky and more than 

 half the length of the articular surface, and it is in contact with the bulla at the middle of its external 

 surface. The large bullae are slightly oval in basal outline and are about the size of those in 

 E. occidentalis. The paroccipital process is compressed and turned obliquely outward, whereas in 

 E. facificus its direction is obliquely inward. Index: 0.565. 



