THE EXTERIOR OF THE SKULL 



179 



Norma Basalis (Fig. 187). The inferior surface of the base of the skull, exclu- 

 sive of the mandible, is bounded in front by the incisor teeth in the maxillae; behind, 



Incisors 



Incisive, canal 



Transmits left nasopalatine nerve 

 Transmits descending palatine vessels 

 Transmits right nasopalatine nerve 



Lesser palatine foramina 



Posterior nasal spine 

 Musculus uvulae 

 Pterygoid hamulus 



Sphenoidal process of palatine 

 Pharyngeal canal 



Tensor tympani 



Pharyngeal tubercle 

 Situation of auditory tube and 

 semicanal for Tensor tympani 

 Tensor veli palatini 

 Inferior tympanic canaliculus 

 Aquaeductus cochleae 

 Jugular foramen 

 Mastoid canaliculus 

 Tympanomastoid fissure 



