THE SKULL AND THE BONES OF THE SKULL 



Notch of Rivinus 



Incisura tympanica (Rivini 



Zygoma 



Processus zygomaticus . 



\ 



Articular portion of glenoid fossa - 

 Facies articularis 



Free margin of tegmen tympani- 



Fissure of Glaser, or petrotympanic fissure. 



Fissura petrotympanica (Glaseri) 



Tympanic plate. 



Pars tympanica 

 Carotid canal Canalis caroticus 



Petrous portion. 

 Pars petrosa 



Squamous portion of temporal bone 



] Squama temporalis 



Squamosomastoid suture 



/Sutura squamosomastoidea 



Mastoid portion 

 Pars mastoidea 



-..Tympanomastoid fissure 



Fissura tympanomastoidea 



Mastoid process 



Ju lar -^ Processus mastoideus 



fossa Stylomastoid foramen Foramen stylomastoideum 



Fossa Vaginal process 



jugularis Vagina processus styloidei 



FIG. 147. THE LEFT TEMPORAL BONE OF A BOY AT THE AGE OF EIGHT MONTHS: FORMATION 

 OF THE TYMPANIC PLATE AND OF THE EXTERNAL AUDITORY MEATUS. SEEN OBLIQUELY 

 FROM WITHOUT AND BELOW. 



Squamous portion of temporal bone 



Squama temporalis 



Anterior tympanic process 

 Processus tympanicus anterior 



Fissure of Glaser, or petrotympanic fissure 



Fissura petrotympanica 



Margin of tegmen tympani 



Petrous portion 



Pars petrosa 



Anterior tympanic spine 

 Spina tympanica major 

 Notch of Rivinus 

 , Incisura tympanica (Rivini) 



Posterior tympanic spine Spina tympanica 



Tympanic plate 



Pars tympanica 



Mastoid portion 



Pars mastoidea 



Squamosomastoid suture 

 "Sutura squamosomastoidea 

 Tympanomastoid fissure 

 Fissura tympanomastoidea 

 Mastoid process Processus mastoideus 

 Digastric fossa Incisura mastoidea 

 Occipital groove- -Sulcus arteriae occipitalis 

 Stylomastoid foramen Foramen stylomastoideum 



Vaginal process 



.Vagina processus styloidei 



FIG. 148. TH LEFT TEMPORAL BONE OF A GIRL AT THE AGE OF THREE YEARS: FORMATION 

 OF THE TYMPANIC PLATE AND OF THE EXTERNAL AUDITORY MEATUS. SEEN OBLIQUELY 

 FROM WITHOUT AND BELOW. 



Development of the Temporal Bones. 



