118 



THE SKELETON 



Fig. 141. — Model of the Chondro-cranium of a Human Fcetus 8 cm. in Length. 

 Cartilage in Blue. Viewed from Above. (After O. Hertwig.) 



Crista galli 



Meckel's cartilage 



Malleus 



Incus 



Meatus aud. int. 



Jugular foramen 



Fossa subarcuata 



Hypoglossal nerve 

 and canal 



Lamina cribrosa 



Ala orbitalis 

 Foramen opticum 

 Ala temporalis 



Sella turcica 

 Dorsum sellae 



Facial nerve and canal 

 Auditory capsule 



Foramen magnum 



Tectum synoticum 



Fig. 142. — An Enlarged Portion of the Same Model of the Chondro-cranium as Shown 



IN Fig. 141. Viewed From the Right Side, Showing the Skeleton of the Auditory 



Region. Cartilage in Blue. (After O. Hertwig.) 



Incus 



Stapes 



Facial nerve 



Pars mastoidea 



Malleus 



Pars petrosa 



Styloid process 



i 



