| 1
.
| Parietal margin |
| 2
.
| Parietal incisura |
| 3
.
| Sigmoid sulcus |
| 4
.
| Mastoid foramen |
| 5
.
| Occipital margin |
| 6
.
| Superior petrous sulcus & subarcuate fossa |
| 7
.
| Aperture of external vestibular aqueduct |
| 8
.
| Posterior pyramidal surface |
| 9
.
| External aperture cochlear canaliculi |
| 10
.
| Internal acoustic meatus |
| 11
.
| Posterior pyramidal angle |
| 12
.
| Inferior pyramidal surface |
| 13
.
| Temporal bone (squamous part) |
| 14
.
| Cerebral surface |
| 15
.
| Groove for posterior branch of middle meningeal artery |
| 16
.
| Arcuate eminence |
| 17
.
| Tegmen tympani |
| 18
.
| Zygomatic process |
| 19
.
| Sphenoidal margin |
| 20
.
| Ant. pyramidal surface |
| 21
.
| Pyramidal apex |
| 22
.
| Styloid process |
