M, R. Thorpe — New Forms of Agriochoerus, 115 



John Day Basin Species. 

 Agriochoerus hullatus, sp. nov. 



(Figs. 2-4.) 



Holotype, Cat. No. 12424, Y. P. M. Upper Oligocene (upper John Day) 

 Turtle Cove, John Day Eiver, Oregon. 



The type material consists of the skull only, with the 

 portion anterior to P^ carried away. It is a submature 

 individual, but with permanent dentition. 



Fig. 2.—Agrioc1iosrus bullatus, sp. nov. Holotype. Left lateral view. 

 X 3/5. 



Specific characters. — Skull mesocephalic ; infra-orbital 

 foramen above middle of P^ ; nasal bones wide, flat, and 

 obtuse posteriorly, as in Oreodon gracilis; orbits propor- 

 tionally smaller than in any other species ; sagittal crest 



/2424, TYPE 

 Y. p. M. 



Fig. 3. — Agriochoerus bullatus, sp. nov. Holotype. Left half, superior 

 view. X 3/5. 



low and relatively short; shallow concavity between tem- 

 poral ridges anterior to their junction; temporal ridges 

 short, beginning well posterior to orbits; palate steeply 

 inclined to sagittal suture, with a cross-section like an 

 inverted V ; palatonarial border opposite posterior lobe of 



