i x.J OF THE DOG. 115 



The superior surface of the skull (Fig. 46) may be divided 

 into a cranial and a facial portion. The former is of a 

 somewhat oval form. On its upper surface posteriorly, in 

 full-grown dogs, is a median ridge joining behind with the 



Fig. 46 - Upper surface of cranium of a Dogs \- SO supraoccipital ; JP inter- 

 parietal ; Pa parietal ; Sq squamosal : Fr frontal ; Ma malar ; L. lachrymal ; 

 Mx maxilla; Na nasal ; PM x premaxilla ; ap anterior palatine foramen ; io infra- 

 orbital foramen ; pof postorbital process of frontal boue. 



superior angle of the occipital crest, and dividing anteriorly 

 into two less elevated ridges which curve outwards to the 

 superior posterior angle of the orbit. This ridge, as long 



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