94 



THE SKULL AND THE BONES OF THE SKULL 



Cribriform plate 



Lamina cribrosa 

 Frontal sinus 

 Sinus frontalis , 



ur/f-a eralli 

 Crista galli 



Septum of the frontal sinuses 



Septum sinuum frontalium 



Foramen caecum 



Foramen caecum 



Orbital plate of the 



frontal bone 



Pars orbitalis ossis 



frontalis 



Orbital plate, os planum, 



or lamina papyracea, of 



the ethmoid bone 



Lamina papyracea 



Vertical plate of the 



ethmoid bone 

 Lamina perpendicularis 

 Infra-orbital groove 

 Sulcus infra-orbitalis 



Uncinate process 

 Processus uncinatus 



Malar bone 



Os zygomaticum 



Maxillary sinus, or antrum 



of Highmore 

 Sinus maxillaris 



Alar process of the ethmoidbone 



Processus alarisbssis ethmoidali 



Lateral mass, or labyrinth, 

 of the ethmoid bones 



Labyrinthus ethmoidalis 



Orbit 

 Orbita 



Superior turbinate bone 

 Concha nasalis superior 



Superior meatus of the 

 nose 



Meatus nasi superior 

 Middle turbinate bone 

 Concha nasalis media 



Middle meatus of the 

 nose 



Meatus nasi media 



- Inferior turbinate bone 



Concha nasalis inferior 



Inferior meatus of the nose 

 Meatus nasi inferior 



The vomer 

 Vomer 



Hard palate 



FIG. 209. BY MEANS OF A SECTION PASSING THROUGH THE MOST ANTERIOR PORTIONS OF : 

 ZYGOMATIC ARCHES, THE NASAL CAVITY AND THE ORBITS ARE DIVIDED TOWARDS 

 POSTERIOR EXTREMITIES IN THE FRONTAL PLANE. 



The anterior portion of the skull thus divided is figured from behind The three turbinate bones of the 

 nose and the three nasal meatus, as well as the bony septum of the nose, are seen in frontal 

 The maxillary sinuses are also opened up, and the communication of these sinuses with the gei 

 cavity of the nose is to be seen above the uncinate process. 



Cavum nasi et orbita Nasal cavity and orbits. 



