THE NERVES. 387 



borders and in the central line to the glands, and the mu- 

 cous membrane of the palate, and to the gums. 



2. Palatinus posterior s. medius passes in a proper canal, 

 and, having left it, backwards to the posterior nasal open- 

 ing. 



3. Palatinus externus s. parvus, for the palatine arches and 

 tonsils. 



b. Nn. nasales posteriores, very fine, pass inwards through the 

 for. spheno-palatinum into the nasal cavity, advancing, when 

 there, between the bones and mucous membrane on the outer 

 wall and on the septum. They pass, contrary to the branches 

 of the first division, in the vault, so that the proper nerves of 

 smell are surrounded in a circular manner by these nerves of 

 sensation, like the optic nerve by the nn. ciliares. 



1. N. naso-palatinus Scarpce s. n. septi narium passes in- 

 wards, before the sinus sphenoidalis, below its opening to 

 the nasal septum, and on this almost horizontally forwards 

 to the canalis incisivus, through which it passes to the mu- 

 cous membrane of the mouth behind the incisor teeth, with- 

 out anastomosing with that of the other side, and without 

 forming a ganglion. 



2. Nn. nasales superiores, three to four, pass vertically down- 

 wards on the posterior part of the outer wall of the nasal 

 cavity, between the mucous membrane and periosteum, sup- 

 plying the concha and nasal chambers, and the pharynx 

 at the orifice of the tuba Eustachii, with a ram. pharyn- 

 geus (Bock). 



3. N. Vidianus s. petrosus superficialis s. recurrens passes 

 from the posterior part of ganglion Meckelii backwards, 

 through the canalis Vidianus, enters between temporal and 

 sphenoid bone, perforating the mass of cartilage in theforam. 

 lacerum anter., into the cranial cavity, and into a sulcus on 

 the anterior surface of the petrous bone, through hiatus 

 canal. Fallopice to the bend of n. facialis, with which it 

 anastomoses. Below it, passes the n. petrosus profundus, 

 a larger branch, and of a more gray hue, which lies in the 

 can. caroticus on the outer side of carotis, and ascends to 

 the gangl. Meckelii from the plexus caroticus, where it 

 anastomoses with the branches which pass to the nerv. 

 oculo-motorius. 



3. Nervus infraorbitalis, the continuation of the trunk, corre- 

 sponds to the n.frontalis, enters through fissura orbital, infer, into 

 the canalis infraorbitalis, passes to its anterior orifice (above and 



