Our material consisted of 100 adult skulls and 50 adult half-head sections where the posterior opening of the pterygopalatinate fossa and the position of the pterygopalatinate ganglion were investigated. The report contains the following specifics: 1. Course and contents of the pterygoidal canal as well as the topographical relations of the canal to the sphenoid sinus. 2. Positioning of the axis of the foramen rotundum to the various planes of the head and its contents. 3. Course of the vomerovaginal canal and its contents. 4. Distances of the pterygopalatinate ganglion to important reference points of the head and to the median-sagittal line.