142 



LECTURE VI. 



aperture of tlie ear, where it terminates, is situated, even in the 

 Negro, in the middle of the longitudinal diameter, and even 



Fig. 45. Base of a Kaffir SkuU. 



Ip 



more forward in the higher races ; but in the anthropoid apes 

 the aperture is situated farther back, and the distance to the 

 end of the jaw is greater than to the hindmost occipital promi- 

 nence ; while the zygomatic arch reaches the posterior half of 

 the longitudinal diameter, and frequently extends to the last 

 third of the length of the skull. The large occipital foramen is 

 also thrown back. In the ape it is situated in the posterior 

 third of the skull ; in man it hes usually in the centre, or even 

 a little forward, — a difference to which Daubenton lono- since 

 drew attention, and which has been fully confirmed by subse- 

 quent researches. 



We must here direct your attention to the relations of the 



