SKULL OF THE DOG 



869 



contrast with all Insectivora except Potamogale) ; the radius 

 and ulna are always distinct ; the fibula is slender but dis- 

 tinct. The scaphoid and lunar bones are fused. 



Fig. 516. — Lower surface of dog's skull. 



O.C., Occipital condyle ; B.O., basioccipital ; T., tjTnpauic bulla ; 

 W.C., postglenoid process behind fossa for condyle of mandible; 

 B.S., basisphenoid ; P.S., base of presphenoid ; v., vomer ; 

 M.2, second molar ; M.i, first molar ; Pm.1-4, premolars, the 

 4th the large carnassial ; c, canine; /.1-3, incisors; Pmx., 

 premaxilla ; mx., maxilla; Pal., palatine; /., jugal ; A.S., 

 alisphenoid ; Pt., pterygoid ; Sq., squamosal (the reference line 

 points to the glenoid fossa). 



The cerebrum is well convoluted, and the cerebellum is 

 more or less covered by the cerebrum. 



