MAMMALIA 



CLASS V 



Fig. 5. 



Skull of the dog {Canis familiaris). A, Palatal, and B, dorsal aspect, so, Supraoccipltal ; pa, parietal ; ■ijj, 

 interparietal ; sq, squamosal ; fr, frontal ; I, lachrymal ; j?i, jugal ; inx, maxilla ; pmx, premaxilla ; na, nasal ; 

 bo, basioccipital ; exo, exoccipital ; per, periotic ; ty, tympanic ; hs, basisphenoid ; ps, presphenoid ; as, ali- 

 sphenoid ; pt, pterygoid ; vo, vomer ; pi, palatine ; pof, postorbital process ; io, infraorbital foramen ; oc, 

 occipital condyle ; pp, paroccipital process ; gp, postglenoid process ; gf, articular surface for the lower jaw ; 

 /m, foramen magnum ; c/, condyloid foramen ; flp, foramen lacerum postering ; sm, stylomastoid foramen ; 

 earn, external auditory meatus ; pgf, postglenoid foramen ; flm, foramen lacerum medium ; fo, foramen ovale ; 

 as, posterior opening of the alisphenoid canal ; fr, foramen rotundum and anterior opening of the alisphenoid 

 canal ; sf, foramen lacerum anterius ; op, foramen opticum ; ppf, posterior palatal perforations ; ap and apf, 

 anterior palatal perforations. (After Flower.) 



Fig. 0. 



Thylacinus cynocephalus. Sagittal cross-section of skull and mandible, so, Supraoccipltal ; exo, exoccipital ; 

 ho, basioccipital ; per, periotic ; bs, basisphenoid ; ps, presphenoid ; as, alisphenoid ; os, orbitosphenoid ; sq, 

 squamosal ; jia, parietal ; fr, frontal ; me, mesethmoid ; na, nasal ; et, ethmoturbinal ; mt, maxilloturbinal ; 

 j)»i,r, premaxilla ; Jiu, maxilla ; ro, vomer ; 2'', palatine ; j)^, pterygoid ; ccZ, condyle of the lower jaw ; a, angle 

 of the lower jaw. (After Flower.) 



