322 
Posterior extremity to nucleus 
Measurement III ... 
99 
99 
99 
IV ... 
V ... 
VI ... 
Total length of the parasite 
Width of undulating membrane 
4 ' 4 /* 
... 1*1 tO 2*2/1 
... 12*0 tO 19‘0/i 
... 11*0 to 12*0/1 
... 1*1 to 2*7/1 
... 30*2 to 39*0/1 
27/1 
From T. sanguinis there seems to be every gradation to the 
“ leaf-like ” trypanosomes of Plate XXVI, fig. 28. These forms occur 
as frequently as does T. sanguinis, and are never seen in slides from 
which T. sanguinis is absent. The posterior part of this leaf-like form 
tapers toward its round and blunt extremity. This portion stains 
more deeply and seems to consist of folds tightly folded. At about 
the junction of the posterior and middle thirds of the body is the 
round nucleus, and in a common plane is the blepharoplast The 
folds of the posterior part of the body gradually unfold until about 
the middle of the body, where they are completely unfolded. The 
body then tapers to a sharp pointed anterior extremity. The 
thickened edge of the undulating membrane arises from the 
blepharoplast, crosses the body obliquely and continues along the 
edge of the body at a distance of 1 n from it to the pointed extremity 
where it becomes the free flagellum. The undulating membrane is 
not well developed, but the thin edge of the body and anterior portion 
of the body seemed, in the fresh, to act as an undulating membrane. 
The measurements are : — 
Posterior extremity to nucleus 
Measurement III ... 
„ IV. 
„ v. 
•* VI, at a level of nucleus 
Total length of the'parasite 
Division forms of this stage were seen. 
I here was another variety of the leaf-form. The posterior part 
is seirated at the extremity and the serrations seem to be the points 
of a petal-like arrangement of the posterior end. The general effect 
is that of a bud about to open (Plate XXVII, fig. 29). 
5-5 to 10*0/1 
i*i to 27 n 
13*2 to 26*0/1 
9-0 to 1i*o n 
6*6 to 9*0/1 
30*0 to 48*0/4 
