PHYSIOLOGY OF THE MICROBES 103 



they present those phenomena of strict adaptation which are 

 equivalent as between the soil or the host and the parasite to 



formation and dischatye 

 oTUt& sporozolles 



a sporvzoite invading ffus 

 epithelial cell andvecomina 

 adult 



division of 

 nucleus 



FlG. 39. Life cycle of a Coccidium (Coccidium Schubergi). 

 (After Schaudinn.) 



true specificities : they cannot endure any other habitat, food, 

 or host. 



For example , Cost 'i : a Jiecatrix which lives attached to the 



