PLATE I. 

 Fig. 1 (X 1.14). 



Head of a dog, the bone has been removed from the lateral aspect of the 

 nose and part of the orbit, exposing the deeper layers of the mucosa in which 

 lie the olfactory nerve bundles and their branches. 



Note the divisions of the 5th nerve and their distribution to the mucosa of 

 the lateral wall of the nose and to the maxillary sinus. 



