258 



THE MICROSCOPIST. 



suits in a delicate network, forming by its accumulation 

 a flat grayish-white croupous membrane, or isolated de- 

 posits. According to this view, the network of croup- 



FIG. 209. 



Fibrinous degeneration of pavement cells. After E. WAGNER. 



membrane occupies the place of epithelium. Other pathol- 

 ogists regard the network as analogous to the fibrinous 

 network of inflamed serous membranes. Croup of the 



FIG. 210. 



Croup of the trachea, a. The undermost layer of pseudo-membrane. 6. The base- 

 ment membrane, c. The subepithelial germinal tissue, d. Excretory duct of a mucous 

 gland, from which a clear mucus is evacuated and lifts off the pseudo-membrane. 1-1000. 

 After RINDFLEISCH. 



larynx and trachea shows a combination of catarrh and 

 pseudo-membranous exudation (Fig. 210). 



