254 DIAGNOSIS OF INFECTIONS OF THE NASAL CAVITIES. 



So many degenerative changes in epithelial cells resemble protozoal 

 forms that such findings require ample confirmation. 



The larval form of the Linguatula rhinaria is a rare parasite of the 

 nasal cavities. 



Various fly larvae are far more common, and the "screw-worm," 

 the larva of the Chrysomyia macellaria, is common in certain parts 

 of tropical America, and may by its burrowing effects cause fatal 

 results. 



