214 



ILLINOIS NATURAL HISTORY SURVEY MANUAL 4 



basioccipital bone. Bone at the base of the cranium (braincase) 

 immediately in front of the foramen magnum (large opening 

 at the base of the skull through which the spinal cord passes). 



bony palate. See hard palate. 



braincase. Part of the skull enclosing the brain, fig. 118. 



bulla (pi., bullae). A hollow, thin-walled, bony prominence of 

 rounded form, fig. 117. 



calcar. In bats, a bony process (extension) from the heel; it par- 

 tially supports the tail membrane, fig. 39. 



canine or canine tooth. The tooth between the incisors (front cut- 

 ting teeth) and the premolars; figs. 117, 119; eyetooth. 



carnassial or carnassial tooth. Shearing tooth found in Carnivora; 

 last upper premolar and first lower molar, figs. 117, 119. 



Braincase 



Rostrum 



Interparietal Bone 



Parietal 

 Bone 



Frontal 

 Bone 



Zygomatic 

 Arch 



Nasal Bone 



Premaxillary Bone 

 Maxillary Bone 



Narial Aperture 



Incisor Teeth 



Fig. 118. — Top view of skull of dog. 



