78 



THE SKULL AND THE BONES OF THE SKULL 



Crista galli 

 Crista galli i 



Alar process 

 Processus alaris 



Alar process 



Processus alaris 



Ethmoidal cells 

 Cellulae ethmoidales 



Vertical plate 



Lamina perpendicularis ' 



Uncinate process 



'Vertical plate 



Lamina perpendiculai is 



Crista galli 



Orbital plate, os planum, Crista galli \ \ Cribriform plate 

 or lamina papyracea \ S i Lamina cribrosa 



Lamina papyracea 



Orbital plate, 



os planum, 



or lamina papyracea ., 



Lamina papyracea 



,. Ethmoidal cells 

 Cellulae ethmoidales - 



Middle turbinate bone of the nose 



Concha nasalis media 



Lateral mass or 



s labyrinth of the 



'' ethmoid bone 



Labyrinthus 



ethmoidalis 



Middle turbinate 



bone of the nose 

 Concha nasalis 

 media 



FIG. 157. THE ETHMOID BONE SEEN FROM 

 THE LEFT SIDE 



FIG. 158. THE ETHMOID BONE 

 SEEN FROM ABOVE. 



Cribriform plate 

 Lamina cribrosa 



Concha suprema of 

 the nose var. ) 

 Concha nasalis 

 suprema (var.) 



Orifice of posterior 

 ethmoidal cells 



Superior turbinate 

 bone of the nose 

 Concha nasalis 



superior 



Middle turbinate bone of the nose 

 Concha nasalis media 



Concha suprema of 

 the nose (var.) 

 Concha nasalis 

 .uprema (var.) 



Cribriform plate 



Lamina cribrosa 



Superior turbina&e 

 bone of the nose 



Concha nasalis 

 superior 



Agger nasi (rudiment of 

 the nasoturbinalof m03t 

 other mammals) 



Agger nasi 



Ethmoidal bulla 

 Bulla ethmoidalis 



Hiatus semilunaris 



Hiatus semilunaris 

 Uncinate process 

 Processus uncinatus 



Uncinate process 



Processus uncinatus 



FIG. 159. THE LEFT HALF OF THE ETHMOID 

 BONE SEEN FROM WITHIN. SUPERIOR AND 

 MIDDLE TURBINATE BONES. 



Middle turbinate bone of the nose 



Concha nasalis media 



FIG. 160. THE LEFT HALF OF THE ETHMOID 

 BONE SEEN FROM WITHIN. 



The anterio" portion of the middle turbinate bone of the nose has been removed. 

 The free border of the removed portion is indicated by a dotted line. 



Concha suprema of the nose (var,) 

 Concha nasalis suprema (var.) \/3? 



Superior turbinate bone of the nose 

 Concha nasalis superior 



Orifices of the ethmoidal 



Ethmoidal bulla Bulla ethmoidalis 

 Infundibulum (leading to frontal sinus) 

 Infundibulum ethmnidMe 



Uncinate process 

 Processus uncinatus 



Middle turbinate bone of the nose 7 



Concha nasalis media . / 



Vertical plate 



Lamina per- 

 pendicularis 



Cribriform plate 



Lamina cribrosa 



Alar process 



Processus alaris 

 Ethmoidal cell 



Cellula ethmoidalis 



, Crista galli 

 X Crista galli 



Common meatus of nos 

 Meatus nasi communU 



Vertical plate 

 Lamina perpendicularis 



Ethmoidal cell 

 Celiula. ethmoidalis 

 Superior turbinate 

 bone of the nose 



Con.jlia nasalis superior 



Middle turbinate 

 bone of the nose 



Concha nasalis media 



FIG. 161. THE ETHMOID BONE SEEN FROM 

 BEHIND AND BELOW. VERTICAL PLATE 

 OF THE ETHMOID AS UPPER PART OF THE 

 BONY SEPTUM OF THE NOSE. 



FIG. 162. AN ETHMOID BONE THE LEFT LATERAL 

 MASS OF WHICH HAS BEEN REMOVED. 



The entire surface of the vertical plate is exposed. 



Os ethmoidale Ethmoid bone. 



