Brain, dura mater, cerebral sinus, base of skull, pituitary gland, shown in isolation, in 4 numbered illustrations. Brain shown with cerebellum divided in sagital section, medial view. 1 illustration of of brain showing meniges in situ, dissected to show sagital sinus, posterior view. 1 illustration of base of skull, meninges in situ, dissected to show cerebral sinuses, foramen magnum, superior view. 1 illustration of pituitary gland, shown in situ on sellica turcica, superior view.