IM ,ML!NITY. 



85 



from hemolysins, contained in the l)lood in which there is anti- 

 toxin. 



Theories of acquired immunity. — Many tlieories have been 



Fig. C2 — Bacterial Immunit.v. 



, „.^„,, c. Amboceptor. 



a cell body. o. compliment 

 b. Cell receptor. 



advanced in explanation of acquired immunity. The chief of 

 which are as follows: — 



