LECTURE VIII. 



207 



I shall presently give the exact measurementSj here I shall 

 only notice a few characters. 



On viewing the skull from above, that of the brown Cebus is 

 distinguished by the rising of the temporal fossa above the 

 Fig. 76. Skull of Cebus apella, side view. 



Fig. 77. Skull of Cebus albifrons, side view. 



margin of the temporal line, passing behind the whole length 

 of the superior orbital brim, and producing in the middle of 

 the forehead a depression which causes the orbital ridge to 



