PLATE III. 

 Fig. 3 (x 1-4). 



Head of a cat, except the mandible. 



The bone has been removed from the nose, orbit, and a part of the cerebruiu. 

 exposing the attached surface of the nasal mucosa. This shows especially 

 the olfactory folds with their nerves, the divisions of the 5th nerve, and their 

 distribution to the lateral wall and mucosa of the maxillai'y sinus. 



Note the small branches of the anterior ethmoidal nerve to the olfactory 

 folds. 



Fig. 4 (X 1-4). 



Median section of the head of a cat, without the mandible ; the bony septum 

 has been removed to show the deep or attached surface of the mucosa. This 

 is to illustrete the mucosa of the septum and its olfactory nerves ; the tur- 

 binated part of the septum and its olfactory nerves ; the vomeronasal organ 

 and its innervation by the olfactory and naso-palatine nerves. 



The anterior ethmoidal branch of the 5th nerve passes along the dorsal 

 part of the septum and is distri))uted to the septal mucosa. 



