PLATE 3 



EXPLANATION OF FIGUKE 



4 Detail under high power of the tip of the lower recvirrent branch of the abdu^ 

 cens shown in figure 1. The nerve fibers, surrounded by a perineurium, have 

 been invaded by phagocytes, which become vacuolated and apparently cause the 

 dissolution of the fibers, as evidenced by the vacant spaces within the nerve 

 sheath. Some of the engorged phagocytes can be seen among the cells of the peri- 

 neurium. (H. E. C, no. 2095, sect. 269.) X 600. 



396 



