BASE OF THE SKULL. 



173 



IS 



16 



38 



1 39 



FIG. 171. INFERIOR SURFACE OF BASK OF SKULL. 



jcipital, vomer, maxillary, and zygomatic bones are coloured red. The temporal and palate bones, blue. 

 The sphenoid and parietal bones, and the teeth, are left uncoloured. 



eternal occipital crest, 

 iperior nuchal line of 

 the occipital bone, 

 foramen magnum, 

 ipital condyle. 

 stoid notch, 

 [astoid process. 

 1 '. External acoustic meatus. 



8. Styloid process. 



9. Mandibular fossa. 



10. Foramen spinosum. 



11. Angular spine of the 



sphenoid. 



12. Foramen ovale. 



13. Lateral pterygoid lamina. 



14. Hamulus of medial 



pterygoid lamina. 



15. Nasal septum. 



16. Posterior nasal spine. 



17. Horizontal part of palate bone. 



18. Palatine process of maxilla. 



19. Incisive foramen. 



20. Intermaxillary suture. 



21. Greater palatine foramen. 



22. Zygomatic process of maxilla. 



23. Inferior orbital fissure. 



24. Infra-temporal fossa. 



25. Zygomatic arch. 



26. Left choana. 



27. Pterygoid fossa. 



28. Scaphoid fossa. 



29. Foramen lacerum. 



30. Opening of osseous part of auditory tube. 



31. Carotid canal. 



32. Jugular fossa. 



33. Stylo-mastoid foramen. 



34. Jugular process of occipital bone. 



35. Groove for occipital artery. 



36. Mastoid foramen. 



37. Canalis condyloideus. 



38. Inferior nuchal line of occipital bone. 



39. External occipital protuberance. 



