The labeled structures are (excluding the correct side):

1. canalicular segment of optic nerve
2. sphenoid sinus
3. frontal horn of lateral ventricle
4. Sylvian fissure
5. body of corpus callosum
6. clinoid segment of internal carotid artery
7. septum pellucidum
8. anterior clinoid process
9. cisternal segment of optic nerve
10. anterior pituitary gland
11. cavernous segment of internal carotid artery
12. nasopharynx
13. optic chiasm
14. supracellar cistern
15. ophthalmic segment of internal carotid artery
16. M1 (horizontal) segment of middle cerebral artery
17. terminal segment of internal carotid artery
18. cavernous sinus
19. A1 (pre communicating) segment of anterior cerebral artery
20. posterior pituitary gland
21. laceral segment of internal carotid artery
22. body of lateral ventricle
23. pituitary stalk
24. Meckel's cave
25. mamillary body
26. clivus
27. interpeduncular cistern
28. posterior clinoid process
29. petrous segment of internal carotid artery
30. third ventricle