The document summarizes the bones and landmarks of the cranial cavity, as well as the three cranial fossae - anterior, middle, and posterior. It describes the shape, location and boundaries of each fossa, as well as the key structures that pass through openings in each fossa, such as cranial nerves, blood vessels, and parts of the brain. Important skull landmarks are also defined, such as the pterion, lambda, bregma, vertex and inion.