IX.] 



OF THE DOG. 



The si/pcrior 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 



risix 



Fk;. 46 - Upper surface of cranium of a Dog, ^. SO supraoccipital ; //-" inter- 

 parietal ; Pa parietal; Sq squamosal; Fr frontal; Ufa malar; L lachrymal; 

 Mx maxilla; Na nasal ; P M x premaxi'Ia ; np anterior palatine foramen ; io infra- 

 orbital foramen ; pof postorbiial process of frontal boi.e. 



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 



I 2 



