296 



Sir D, Bruce and others. Trypanosome 



[Feb. 8, 



Table XII. — Percentage of Posterior-Nuclear Forms found among the Short 

 and Stumpy Varieties of the Trypanosome of Strain IV, Chipochola. 



Date. 



Experiment 

 No. 



Animal. 



Percentage among short 

 and stumpy forms. 



1912. 









Sept. 20 



1337 



Eat 



1 



„ 23 



1337 





1 



„ 24 



1337 





2 



„ 25 



1337 



» 



4 



„ 26 



1337 









„ 28 



1337 









„ 29 



1337 





1 



„ 30 



1337 



» 



14 



Oct. 1 



1337 





5 



M 2 



1337 





S 





3-3 



V. Morphology of Strain V, Chibibi. 



The following table gives the average length of this trypanosome as found 

 in goats, monkeys, dogs and rats, 1000 in all, and also the length of the 

 longest and shortest : — 



Table XIII. — Measurements of the Length of the Trypanosome of Strain V, 



Chibibi. 



Date. 



Method of fixing. 



Method of 

 staining. 



In microns. 



Average 

 length. 



Maximum 

 length. 



Minimum 

 length. 



1912 



Osmic acid 



G-iemsa 



22 -4 



37 -0 



15 -0 



The average length of the trypanosome of Strain V, in different species of 

 animals, is as follows : — 



Table XIV. 



Species of animal. 



Number of 

 trypanosomes 

 measured. 



In microns. 



Average 

 length. 



Maximum 

 length. 



Minimum 

 length. 





80 



19 -9 



31 -0 



16 -0 





160 



21 -8 



32 -0 



15 -0 



Dog 



260 



20 "6 



37 -0 



16-0 



Eat 



500 



24 -0 



32-0 " 



18-0 



