320 
middle of the anterior portion of the body, or. turning a little to one 
side, is closely applied to the margin of the anterior part of the body. 
In one specimen a bluish line connected the blepharoplast with the 
nucleus. The nucleus is long and narrow, sometimes extending 
completely across the body, sometimes occupying half the width. 
Just posterior to the nucleus is a vacuole, and often when the nucleus 
does not occupy the whole width of the body there is another beside 
it. Near the posterior extremity is a red mass, rather more lightly 
stained than the blepharoplast, which consists of from one to four 
granules imbedded in a matrix ; this we have called the posterior 
granule. The size of this mass varies from a small point i/i in 
diameter. In one case a blue line was seen to extend from this 
mass anteriorly, but only for a short distance. It did not connect the 
posterior granule and the nucleus. One of these herpetomonas-like 
forms has a large anterior end (Plate XXVI, fig. 23), similar to the 
bulbous form seen in the fresh preparations (fig. 24 in text). Masses of 
agglutinated parasites of this type were seen (fig. 22). Two anomalous 
forms were seen which probably belong to this state. One has a body 
length of 10 fi and a width of 4'4//. Numerous filamentous flagella 
seem to arise from the blepharoplast at one end, and the organism 
seems to be encircled by an undulating membrane. The other is quite 
herpetomonas-like except for the presence of four flagella (Plate XXVI, 
fig. 22). It measures as followsPosterior extremity to posterior 
granule i'2/x ; posterior granule to nucleus 5‘44 ; length of nucleus 
3’3/U ; nucleus to anterior extremity V2/x. The anterior part of the 
body in the region of the nucleus and blepharoplast is wider, being 
2 2/1 wide. The flagella are 15/i, 4-4//, 4-9/* and 5*5 ft respectively. 
Similar forms were seen in the fresh preparations. They bear 
some resemblance to the trichomonas described in the intestine of 
frogs. The blood was, however, taken and kept with every care, and 
there was certainly no contamination. These forms certainly occur 
in the blood; whether they represent a stage in the development of 
T. Ioricaturn or not it is difficult to say. 
The next stage in the development is a form resembling 
T. inopinatum 3 (Plate XXVI, figs. 25, 26). This stage is found in 
fresh blood, in contradistinction to the forms just described, which 
were found in kept blood alone. The parasites of the T. inofinatutti 
type may be divided into two groups to facilitate measurements. The 
