Cavity of mesencephalon
The cavity of mesencephalon forms the cerebral aqueduct.The cavity of Rhombencephalon forms the fouh ventricle.The cavity of prosencephalon forms lateral and third ventricle.(Ref: Vishram Singh textbook of clinical neuroanatomy second edition pg 4)
Lateral ventricle
Fouh ventricle
Cerebral acqueduct
Third ventricle
Brain 