354 TRYPANOSOMA SIMIM [CH. 



nucleus oval ; micronucleus small, round, situated about 1-5 

 microns from posterior extremity, placed laterally, protuberant ; 

 undulating membrane marked, thrown into bold folds ; flagel- 

 lum frequently not projecting beyond undulating membrane, 

 sometimes i to 2 microns of the extremity apparently 

 free." 



Fig. 79. Trypanosoma simice. Successive stages in the division shewing the 

 peculiar manner in which the two daughter trypanosomes seem to " slip " 

 past each other, until they are only joined by their non-flagellate ends. 

 (After Bruce, Harvey, Hamerton, Davey and Lady Bruce.) 



In the blood of the monkey these trypanosomes swarm in 

 enormous numbers and numerous division forms can be seen, 

 often four or five in a field. When dividing the trypanosomes 

 appear to slip past one another until they are only joined by 

 their posterior extremities, as shewn in Fig. 79. Multiplication 

 often takes place so rapidly that the individual trypanosomes 

 have not time to disengage themselves and thus large multi- 



Fig. So. Trypanosoma simia. Large multinucleate form. (After Bruce, 

 Harvey, Hamerton, Davey and Lady Bruce.) 



