1899. 



Wortma7i, Restoration of Oxyiviia Ii/pi/ia. 



141 



the loose dirt containing the fragments was gathered up and trans- 

 ferred to the nearest stream where it was washed out after the 

 manner of the placer miner. In this way, wherever conditions 

 were favorable, all the fragments were recovered, but in the case 

 of the present skeleton, after every possible exertion, a large 

 number of pieces necessary to complete the skeleton remained 

 missing. When the Cope collection was purchased by the 

 Museum and the two collections were brought together it was 

 accidentally discovered by Dr. Matthew that the specimen of the 

 Cope collection furnished the missing parts of one and the same 

 individual of the Museum specimen collected in 189 1 ; in this 

 way an unusually complete skeleton for an Eocene fossil results 

 and furnishes all the more important characters. 



Sktill. — All the details of the form of the skull cannot be 

 accurately made out owing to the great amount of crushing and 

 fracture which the specimen had sustained during the process of 



Fig. I. O.ryo'na lupina Cupe. Skull and jaws, % natural size. No. 107. 



fossilization ; but enough is preserved in an uninjured condition 

 to indicate that the facial portion was very short and broad in 

 proportion to the total length of the cranium. That part of the 

 skull posterior to the orbits is proportionately much elongated 

 and, owing to the small size of the brain-case, it appears to be 

 unusually so. The sagittal crest is prominent and extended well 

 forward ; the zygomatic arches are wide and heavy, and the 

 glenoid cavity has a distinct pre- and post-glenoid process. The 



