458 
Trypanosoma gamhiense 
follow the numerous curves of the trypanosome. The breadth was 
always measured through the tropho-nucleus, and transversely to the 
axis. 
From the figures obtained as the result of this rather laborious 
series of measurements, two curves have been plotted, one of which 
(curve A), expresses the relative frequency of trypanosomes of any 
particular length, and the other (curve B), of any particular shape. 
In curve A the length of the trypanosomes is plotted along the 
horizontal line, and the number of individuals of any particular length 
is given by the vertical heights, and it is evident that there are three 
distinct apices to the curve. 
In curve B the relation , which expresses the shape of the 
trypanosomes, is plotted horizontally, and the number of individuals, 
vertically. Here again there are three distinct apices, although the 
one corresponding to the “stumpy forms” is much lower than the 
other two. 
These two curves, therefore, each exhibiting three well-marked 
apices, conclusively prove the existence of three distinct types in 
Trypanosoma gamhiense. 
REFERENCES. 
Minchin, E. a. (1908). Note on the Polymorphism of Trypanosoma gamhiense. 
Parasitology., Vol. I. pp. 2,36—237, PI. 17. 
Salvin-Moore, J. E., and Breinl, A. (1907). The Cytology of the Trypanosomes. 
Part I. Ann. Prop. Med. Parasit., Vol. I. pp. 441—480, Pis. 38—41, and 
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