218 Dr. H. B. Fantham. History of T. gambiense [Oct. 15, 
made. Rounding and rounded forms of trypanosomes were seen, just as in 
infected rats. 
Needless to say, a very careful examination of the internal organs of 
normal (uninfected) rats and guinea-pigs was made for the purposes of 
comparison and control. 
The Formation of Latent Bodies from Flagellate Trypanosomes. 
This is diagrammatically represented in text-fig. 1, in which the formation 
of a rounded body from a living trypanosome was observed under the 
Text-Fic. 1 represents diagrammatically the formation of a latent (non-flagellate) body 
of Trypanosoma gambiense in infected rat’s blood, as seen under the microscope on a 
warm stage, during a period of 30 minutes. 
The intervals were 3, 8, 15, 20, 23, 25, and 30 minutes respectively from the 
commencement of change of form of the parasite. Intranuclear karyosome not 
represented. 
microscope in a drop of blood and lymph from the tail of an infected rat. 
The time taken for the formation of the rounded body was 30 minutes. 
In this process the anterior or flagellar end disintegrates and is cast off, 
