CHAP. V] THE CRANIA OF THE SIMI1DAE (PRIMATES) 



239 



as shewing that the human skull is therein more generalized 

 and primitive than those of the Simiidae. 



(1) Lack of bony ridges. I 



have to thank Mr 



Robson (of New 



College, Oxford) for 



pointing out that this 



may be a secondary 



acquisition. 

 Large nasal bones. 

 Wide spheno - maxillary 



fissure. 

 Articulation of parietal 



and sphenoid bones at 



the pterion 1 . 

 Articulation of parietal 



and ethmoidal bones 



in the orbit 1 . 

 Uniformity in the size of 



the teeth. 

 It should be understood, how- 

 ever, that these lists 



are not exhaustive. 



(2) 



(3) 



(4) 



(5) 



(6) 



Fig. 160. Basis cranii of an Orang- 

 utan, shewing the position of the 

 foramen magnum, far back in con- 

 trast with its position in the human 

 skull. Fig. 150 a should also be com- 

 pared with Fig. 150 b, when the same 

 contrast will be observed. (Hose 

 donation, Mus. Anat. Cant.) 



1 The contrast is in this instance with the African Simiidae only. 



