136 



THE SKULL 



[CHAP. 



appearance of the skull, either in members of the same 

 species, or in different but allied species. 



The upper part of the skull, in front of the diverging 

 boundary lines of the temporal fossa, is expanded and some- 



FIG. 48. Upper surface of cranium of a Dog, \. SO supra-occipital; IP inter- 

 parietal ; Pa parietal ; Sq squamosal ; Fr frontal ; Ma malar ; L lacrymal ; 

 J/.r maxilla ; Na nasal ; PMx premaxilla : ap anterior palatine foramen ; io infra- 

 orbital foramen ; pof postorbital process of frontal bone. 



what flattened, and has on each side a triangular process 

 (pof\ which curves somewhat downwards, and indicates the 

 division of the temporal fossa behind from the orbit in front. 



