48 



THE SKULL AND THE BONES OF THE SKULL 



Anterior nasal aperture 



Apertura pyriformis 



Superciliary ridge 

 Arcus superciliaris 



Entrance to the orbit x 



Aditus orbitae 



Hard palate 



Palatum durum 



Posterior nares 

 Choanae 



Premaxillary suture 



I Sutura incisiva 



Supra-orbital margin 



/Margo supra-orbitalis 



Row of teeth 



Limbus dentalis 



Infratemporal crest 



Crista infratemporalis 



Zygomatic fossa 

 Fossa infratemporalis 



Sphenosquamous suture 



Sutura sphenosquamosa 



Groove for Eustachian tube 



Sulcus tubae auditivae 



Styloid process 

 Processus styloideus 



External auditory aperture . 

 Porus acusticus externus 



Mastoid process 



Processus mastoideus 



Occipitomastoid suture 

 Sutura occipitomastoidea 



Foramen magnum 

 Foramen occipitale magnum 



Pterygoid process 



rocessus pterygoideus 



Pterygopalatine or pterygo- 

 pharyngeal canal 



Canalis pharyngeus 



_*Basipharyngeal canal 



Canalis basipharyngeus 1 



Foramen lacerum medium 



Foramen lacerum 

 Petrosphenoidal fissure 



Kissura sphenopetrosa 



_ Petrobasilar fissure 

 Fissura petro-occipitalis 



Jugular foramen (foramen 

 lacerum ppsterius) 

 Foramen jugulare 



Occipital condyle 



Condylus occipitalis 



Inferior curved line 



Linea nuchac inferior 



External occipital protuberance ; 

 Protuberantia occipitalis externa 



Nuchal plane 

 N Planum nuchale 



N, External occipital crest 

 Crista occipitalis externa 



1 *Canalis basipharyngeus,* basipharyngeal canal : This term is not often used by English anatomists, nor even 

 is the canal itself mentioned by Quain. Macalister, however, in his description of the vomer, writes (p. 233) : 

 " In the region of its sphenoidal articulation there are three canals transmitting small vessels in the young 

 skull, which usually become obliterated with advancing age ; these are one median vomerine canal between 

 the vomer and the root of the rostrum, and a lateral on each side between the extremity of the ala vomeris 

 and the vaginal process. These run parallel to, and may communicate with, the pterygopharyngeal [pterygo- 

 palatine] canal in the vaginal process." The two lateral canals here mentioned are those called by Toldt 

 Canutes basipharyngei. TR. 



FIG. 104. EXTERNAL ASPECT OF THE BASE OF THE SKULL : BASIS CRANII EXTERNA. 



Cranium The skull. 



