22 



ANATOMY OF THE RABBIT 



form the major portion of the zygomatic arches) and with the 

 premaxillaries and frontals. The major portion of the max- 

 illoturbinals (inferior nasal conchae) is attached to the pre- 

 maxillaries. The premaxillaries and maxillaries form the 

 maxillae or upper jaws. 



The floor of the cranium and interorbital bony structures 

 are formed mainly by the basal portion of the occipital, and 

 by the various parts of the sphenoid bones. 



MF 



Fig. 3.- — Right mandular ramus, lateral view. A, angle; AS ascending (con- 

 dyloid process); B, body (horizontal ramus); C, condjde; D, diastema; I, incisors; 

 MF, mental foramen ; MN, mandibular notch; SN, supra-angular notch. 



The mandible (lower jaw, inferior maxilla; Fig. 3) comprises 

 a right and a left mandibular ramus which bear the teeth. The 

 cranial ends of these two rami articulate with each other and 

 form the mandibular symphysis. On the medial side of the 

 body of the mandibular ramus there is a rough area, the 

 mylohyoid Hne, for the attachment of the mylohyoid muscle. 

 The mandibular (inferior dental) foramen, which is caudoven- 

 trad to the last tooth, permits entrance of the inferior alveolar 

 artery and mandibular nerve to the roots of the inferior teeth. 

 Branches of this artery and nerve pass out of the bone through 

 the mental foramina. The medial side of the angle and of the 



