208 



LECTURE VIII. 



project. The temporal line is thereby less distinct and runs 

 nearly parallel with the central line, until with a sudden curve 

 it reaches the point of junction between the lambdoid and 

 temporo-occipital sutures. In the white-fronted Cebus, on the 

 contrary, the temporal line proceeds from about the middle of 

 the superior orbital margin, and rises in a curve towards the 

 central line, so that between the two temporal lines there 



Piff. 78. Base of skull of the Brown Cebns. 



remains only a space of a centimetre, it then turns abruptly to 

 reach the same point as in the former species. In this way 

 there is formed on the forehead a triangular space, smooth and 

 somewhat arched, differing considerably from the depressed 



