466 



FAMILY: TRYPANOSOMIDyE 



21 



%% 



25 



Fig. 197. — Trypanosoma lewlsi (x 2,000). (Original.) 



1-15. Forms which occur in the blood of the rat during the reproducing pha 

 16-19. Forms which occur in the blood in the later stages of an infection. 

 20-23. Metacyclic trypanosomes which occur in the faeces of infective fleas. 



