Bui. 168, Bureau of Animal Industry, U. S. Dept of Agriculture. 



PLATE I. 



Hainas.del __ 



A PORTION OF THE PYLORIC END OF A HOG'S STOMACH. INFESTED WITH 

 AROUENNA STRONQYLINA AND PHYSOCEPHALUS SEXALATUS. (NATURAL SIZE.) 



The worms appear as fine red lines partly buried in a yellow glairy mass of necrotic tissue. 

 Ulcers are found underneath this necrotic tissue. 



