THE SKULL AND THE BONES OF THE SKULL 



Longitudinal sulcus 



Sulcus sagittalis 



Sagittal or interparietal suture 



Sutura sagittalis 



Frontal crest 

 Crista frontalis 



Foramen caecum 



Foramen caecum ' 



Diploic canals, or ^--'" I JjF 



canals of Breschet 



Canales diploici ._ 

 (Brescheti) 



Optic foramen 



Foramen opticum 



Spbenoidal or superior 



orbital fissure 



Fissura orbitalis superior H 

 Anterior cranial fossa T 

 Foramen rotundum 

 Foramen rotundum 



Jugular foramen divided \t_ 

 into two parts by the intra- _- 



jugular process (var.) 

 Foramen jugulare bipartitum 

 (var.) 



Sigmoid sulcus, or groove of 

 the lateral sinus 



Sulcus sigmoideus 



Posterior condylar foramen 



Canalis condyloideus 



Crista galli 



/' Crista galli 



Parietal eminence 



Tuber parietale 



Coronal or fronto- 

 parietal suture 



Sutura coronalis 



Anterior cranial fossa 



Sphenoparietal suture 



Sutura sphenoparietalis 



21 Squamous suture 



Sutura squamosa 



// Spheuosquamous suture 

 '(/ I Sutura sphenosquamosa 



' " / Middle cranial fossa 



-/ Inferior petrosal sulcus 

 / Sulcus petrosus inferior 

 - Petrobasilar fissure 



Fissura petro-occipitalis 

 " Jugular foramen 

 Foramen jugulare 



' Occipitomastoid suture 

 Sutura occipitomastoidea 



" Mastoid process 

 \ Processus mastoideus 



Posterior cranial fossa 



Faramastoid or paroccipital process (var.) 



Processus paramastoideus (var.) 



Anterior condylar foramen ' 

 Canalis hypoglossi 



> Atlas 



Atlas 



Clivus, or basilar groove 

 Clivus 



FIG. 201. SKULL DIVIDED INTO AN ANTERIOR AND A POSTERIOR PORTION BY A FRONTAL SECTION 

 PASSING THROUGH THE MASTOID PROCESSES. THE FlKST CERVICAL VERTEBRA HAS ALSO BEEN 

 DIVIDED BY THE SECTION, AND LEFT ATTACHED TO THE SKULL. 



VIEW OF THE ANTERIOR PORTION OF THE CRANIAL CAVITY. THE ANTERIOR AND MIDDLE CRANIAL 

 FOSSAE, AS WELL AS THE ANTERIOR PORTION OF THE POSTERIOR CRANIAL FOSSA, SEEN FROM 

 BEHIND. ON THE RIGHT SIDE is A PARAMASTOID PROCESS ARTICULATING WITH THE ATLAS. 



Cavum cranii cerebralis Cranial cavity. 



