The specimen is the left half of a brain sectioned in the midsagittal plane. The brain stem has been removed by a cut through the thalamus and internal capsule. The trunk of the posterior cerebral artery together with its choroidal and hippocampal branches is likewise cut away. The meninges have been stripped off. The arched course of the fornix (16) around the cerebral peduncle and thalamus can be traced. The continuation of the dentate fascia (gyrus) via the fasciola cinerea into the supracallosal gyrus (induseum griseum) is apparent. Note that the hippocampal fissure also continues around the splenium to the upper side of the corpus callosum. Here it is known as the sulcus corporis callosi. The hippocampal gyrus (10) narrows posteriorly as the isthmus gyri fornicati and this in turn is continuous with the gyrus cinguli. The hippocampus is obscured by the fornix in this view.