LIST OF ILI^USTRATIONS. IX 



Fig. 43. Showing shapes of abnormal eggs sometimes found. page 



(From von Durski after Landois) 178 



Diagrammatic representation of the life history of a 



Coccidium. (After Cole and Hadley) 184 



Ten-day White Leghorn chicks showing symptoms of 

 bacillary white diarrhea. (After Rettger and 

 Stoneburn) 189 



Normal ten-day White Leghorn chicks. (After Rett- 

 ger and Stoneburn) 189 



Trachea (windpipe) of a pheasant, showing gape 

 worms (Syngamus trachealis) attached to the mu- 

 cous membrane. (After Megnin) 196 



A pair of Syngamus trachealis attached. (After Meg- 

 nin) 196 



A pair of Syngamus trachealis. (After Megnin) ' 197 



(After Megnin) 197 



