1
.
| Petrosal part |
2
.
| Carotid canal (partially beneath cochlea) |
3
.
| Cochlea |
4
.
| Borders of internal acoustic meatus |
5
.
| Common crus semicircular canal |
6
.
| Semicircular canal superior (note ampulla near junction of anterior crus with vestibule) |
7
.
| Crus simplex semicircular canal |
8
.
| Semicircular canal posterior (ampulla is visible at inferior termination of canal in vestibule) |
9
.
| Temporal bone (squamous part) |
10
.
| Tympanic part |
11
.
| Vestibulum |
12
.
| Malleus (faintly visible within middle ear cavity) |
13
.
| Incus (faintly visible) |
14
.
| External acoustic meatus (beneath squama) |
15
.
| Facial canal |
16
.
| Stylomastoid foramen (in background) |
17
.
| Semicircular canal lateral (ampulla difficult to distinguish at anterior termination of canal) |
18
.
| Mastoid process |