OSTEOLOGY 



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Larger tympanic spine 



Smaller tympanic spine 



External acoustic pore 



Temporal squama ("scale") 



Parietal margin 



Parietal notch 



Sphenoidal margin 



Temporal surface 



Zygomatic process 



Mandibular fossa (O. T. glenoid 



cavity) 



Articular surface 

 Articular tubercle 

 Cerebral surface 

 Groove for middle temporal artery 



Parietal bone 



Cerebral surface 



Parietal surface 



Occipital margin 



Squamosal margin 



Frontal margin 



Sagittal margin 



Frontal angle 



Occipital angle 



Sphenoidal angle 



Mastoid angle 



Parietal foramen 



Parietal tuber (O. T. parietal emi- 

 nence) 



Inferior temporal line (O. T. temporal 

 ridge) 



Superior temporal line 



Sagittal sulcus 



Transverse sulcus (O. T. groove for 

 lateral sinus) 



Frontal bone 



Frontal squama (" scale ") 

 Frontal surface 

 Supraorbital margin 

 Orbital part 

 Ethmoidal notch 

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Nasal part 



Frontal spine (O. T. nasal spine) 



Nasal margin 



Parietal margin 



Zygomatic process 



Temporal surface 



Temporal line 



Frontal tuber (O. T. frontal emi- 

 nence) 



Superciliary arch (O. T. superciliary 

 ridge) 



Glabella(" smooth") 



Supraorbital foramen or notch 



Frontal notch or foramen 



Orbital surface 



Trochlear spine 



Trochlear pit 



Anterior ethmoidal foramen 



Posterior ethmoidal foramen 



Fossa of lacrimal gland 



Cerebral surface (O. T. internal sur- 

 face) 



Frontal crest 



Sagittal sulcus 



Blind foramen 



Frontal sinus 



Septum of frontal sinuses 



Ethmoid bone 



Cribriform plate 



Cock's comb 



Alar process 



Perpendicular plate 



Ethmoidal labyrinth (O. T. lateral 



mass of ethmoid) 

 Ethmoidal cells 

 Ethmoidal funnel 



Semilunar hiatus 

 Ethmoidal bulla ("bubble") 

 Papyrus or paper plate (O. T. os 



planum) 



Ethmoidal foramina 

 Supreme turbinated bone 



