I — Mandible; 2 — Anterior nasal spine; 3 — Vomer; 4 — Inferior nasal concha; 5 — Middle nasal concha; 6 — Infra-orbital margin; 7 — Ethmoid; Ethmoidal bone, perpendicular plate; 8 — Sphenoid; Sphenoidal bone, lesser wing; 9 — Nasal bone; 10 — Supra-orbital margin;
II — Frontal notch/foramen; 12 — Frontal bone; 13 — Supra-orbital notch/foramen; 14 — Parietal bone; 15 — Sphenoid; Sphenoidal bone, greater wing; 16 — Temporal bone; 17 — Orbit; 18 — Orbital surface; Sphenoid; Sphenoidal bone, greater wing; 19 — Zygomatic bone;
20 — Infra-orbital foramen; 21 — Piriform aperture; 22 — Maxilla; 23 — Teeth; 24 — Mental foramen
