152 A MANUAL OF ANATOMY. 



mucous membrane of the middle and inferior meatuses 

 and inferior turbinated bone of the nose, (b) The small 

 or posterior palatine nerve traverses the lesser or accessory 

 palatine canal to reach and supply the soft palate, the 

 tonsil and the uvula ; also the levator palati and the azygos 

 uvulae muscles. (c) The external palatine nerve. A very 

 small filament extends through the external palatine canal 

 to supply the tonsil and the soft palate. 



(3) The internal branches. (a) The superior nasal 

 branches, six or seven filaments, passing through the 

 sphenopalatine foramen to supply the mucous membrane 

 covering the posterior part of the middle and superior tur- 

 binated bones and the posterior ethmoidal cells. () The 

 septal branch nasopalatine, or nerve of Cotunnius 

 crosses the roof of the nose to the septum, runs down- 

 ward and forward buried in the mucous membrane of the 

 septum, which it supplies, to terminate after passing 

 through the anteroposterior pair of foramina (Scarpa's) 

 in the mucous membrane of the roof of the mouth. (The 

 left nerve takes the anterior, the right the posterior 

 foramen.) 



(4) The posterior branch has already been described as 

 the Vidian nerve. See above. 



THE BRAIN. 



THE MEMBRANES OF THE BRAIN. 



The membranes of the brain are the dura, arachnoid, 

 and the pia. 



The dura has already been described. See page 32. 



The Subdural Space. The space between the dura 

 and the following membrane the arachnoid is called the 

 subdural space. 



