THE NINTH OR GLOSSO-PHARYNGEAL NERVE. 



81' 



FIG. 491. Plan of the glosso-pharyngeal, pneumogastric, and spinal accessor}- nerves. (After Flower.) 



The inferior, or petrous, ganglion is situated in a depression in the lower bor- 

 der of the petrous portion of the temporal bone ; it is larger than the former and 



