Prof. H. Q. Seeley — On Oudenodon Jrom the Cape. 109 



0. prognathus by wanting the anterior angle to the eye. It is 

 separated from 0. Greyi by the same characters, as well as by 

 wanting the large anterior nares of that species, and by having the 

 te.mporal vacuities elongated from front to back. It has a relatively 

 longer nose than 0. megnlops, has not the eyes so far forward as iu 

 0. Baini or 0. brevirostris ; and the skull is much narrower than in 

 the East London species 0. raniceps and differs in its proportions, 

 being of thin and delicate build, while 0. raniceps has the bones 

 relatively strong. 



Oudenodon {Aulacocephalus) pithecops, Seeley, sp. nov. 



From the Dicynodont Beds of East London, Cape Colony. Restored from [R. 1819]. 



Preserved in the Brit. Mus. Nat. Hist. \ less than natural size. 



The skull is depressed, about twice as wide as high, and measured 

 transversely in front of the orbits, it is half as wide as long. The 

 preorbital region forms nearly an equilateral triangle, conical, rounded 

 from above downward and from side to side. Towards the extremity 

 of the snout, on each side there is a longitudinal depression, extending 

 from the orbits forward to the nares. Those openings were small, 

 and at present are obscured with matrix. 



The orbits almost suggest the eyes of a lemur in their large 

 circular form ; their chief direction is upward and outward. The 

 interspace which divides them is about one-third the diameter of 

 an orbit. The maxillary border extends back as far as the fi'ont 

 of the orbit, below which it is notched out and gives place to the 

 malar bar, which contracts a little behind the orbit from above. 

 In side view it is prolonged back parallel to the alveolar mai'gin, 

 uniting in the usual way with the squamosal, and with the vertical 

 bar of the postfrontal bone which descends behind the orbit. The 

 external squamosal element of the zygoma is inclined obliquely 

 outward, and as it extends backward becomes deeper by ascending. 

 Its upper edge is on a level with the base of the orbit in the malar 

 portion at the back of the orbit, but the concave upper outline of 

 the zygoma is on a level with the middle of the orbit, where the 

 arch terminates posteriorly. It is there inclined inward at an angle 



