Image 4:

1. Articular tubercle (at anterior root of zygomatic arch)
2. Basiocciput (posterior clivus)
3. Hypoglossal canal
4. Pterygopalatine fossa
5. Pterygoid plates
6. Pterygoid process
7. Occipitomastoid suture
8. Occipital bone (squamous part)
9. Pterygomaxillary fissure
10. Sphenoid, greater wing
11. Sphenoid spine
12. Sphenopalatine foramen
13. Styloid process, base
14. Zygomatic arch
15. Zygomaticofacial foramen / canal