Chap. XLII.] NASAL Mucous MEMBRANE. 



335 



conical, epithelial cells, each with an oval nucleus. In 

 some places the free surface of these cells is covered 

 with a bundle of cilia, similar to the superficial cells 



Fig. 166. From a Vertical Section through the Olfactory Mucous 



Membrane of the Guinea-pig. 



a. The epithelial cells; 6, the sensory or olfactory colls; o, the deep epithelial 

 cells ; d, the bundles of olfactory nerve-fibres ; e, the alveoli of serous 

 (Bowman's) glands. (Atlas.) 



of the respiratory part of the nasal cavity ; in most 

 places, however, the cilia are absent ; the former 

 condition obtains in those places which are in close 

 proximity to the respiratory region. 



(b) Between the epithelial cells extend spindle- 

 shaped cells, each with a spherical, or very slightly 



