ENDOCRANIAL ANATOMY OF OREODON 



295 



the measurements of the cast, it is probable that the skull is one 

 of an adult animal somewhat older than Specimen III but not 

 so old as Specimen II. 



DISCUSSION 

 Measurements 



Specimen I falls notably below the average both in linear and 

 volumetric measurements, so it is presumed to be from a smaller 



.for. con. 



animal than the others, possibly an immature specimen. Omit- 

 ting it from the series, the average measurements of the other 

 four specimens are as follows : maximum transverse ' cerebral 

 diameter, 4.6 cm.; maximum interpyriform diameter, 4.5 cm.; 



