42 



DISEASES OF POULTRY. 



c 



In Fig. 6 D the 

 worms are shown 

 attached to the 

 mucous membrane 

 of the trachea. 

 This is a drawing 

 from the windpipe 

 of a pheasant, that 

 has been slit open 

 to show the worms 

 as they are found 

 in affected birds. 

 In this bird about ^ig. s.-a pair of 



tTlirtv nairs of sy "games (enlarg-ed 

 iniriy pdirs, oi ^^^^ diameters); a, 



worms were found Solfti of f e'mail'U^i 

 in various stages of f„- - i| Lm\?eU?,; 

 development, and f"" "^side. 

 it can be seen that the obstruction 

 of the air passage was almost or 

 quite complete. A larger drawing 

 of a pair of worms is seen in Fig. 7 

 E, which also illustrates the attach- 

 ment of the worms by means of their 

 mouths to the mucous membrane of 

 the trachea. A pair of worms is 

 shown still more enlarged in Fig. 5 , in order to give 



some 



