THE OSTEOLOGY OF SINOP A— MATTHEW. 



211 



short process also extends backward above the zj^gomatic process of 

 the squamosal. 



The brain case is larger than in the opossum, but as in that animal 

 the cerebral lobes were entirely contained within the parietals above, 

 the frontals surrounding- the olfactory lobes only. The elongate 



cranial portion of the skull causes the arrangement of the cerebellar 

 lobes to be entirely different from that of the opossum or of the 

 insectivora, corresponding more with that in the Oligocene Carnivora. 

 The cerebral lobes, however, are much smaller than in any of these. 

 The basicranial region is long, a feature eminently characteristic of 



