T. Goodey 
555 
When properly fixed and stained it is found that the body of the 
flagellate is longer than it is broad, varying in length from about 7 fi 
to 12p,, and that the protoplasm of which it is made up is alveolate in 
structure. 
Small bacteria are frequently to be seen lying in the protoplasm of 
the body. A mouth or cytostome could not be distinguished in any of 
the numerous organisms examined, but one may be present neverthe¬ 
less. It is highly probable that the flagellate feeds by the ingestion of 
bacteria by means of pseudopodial activity, when undergoing amoeboid 
movement. PI. XXII, fig. 21, showing a flagellate with numerous in¬ 
gested bacteria in a much extended amoeboid condition, supports this 
suggestion. 
The nucleus, which is oval or ellipsoidal in shape, lies towards the 
anterior end of the body. It seems to stain rather diffusely, and shows, 
so far as our preparations reveal its structure, no karyosome. Occasion¬ 
ally, a few rather more deeply staining areas can be distinguished in it. 
In front of the nucleus there is a distinct round or oval blepharo- 
plast, which is connected with the nucleus by means of a short rhizo- 
plast. 
The flagella are four in number, not three as in Trichomonas in- 
testinalis, and arise from the blepharoplast. They are rather long and 
delicate, all appearing to be of about the same length, and stain faintly. 
There is an undulating membrane which takes origin in the ble¬ 
pharoplast, and extends along one side of the body, to about two-thirds 
or three-quarters the length of the latter. There does not appear to 
be a free posterior flagellum to the undulating membrane, and in this 
respect it differs from Trichomonas intestinalis, and many other species 
of the same genus. 
A chromatinic basal rod (“parabasal body” of Kofoid) appears to 
be present in connection with the undulating membrane, though it 
varies greatly in its extent and staining reactions. In one or two cases 
it appeared to follow the edge of the organism, whilst in others it seemed 
to be curved on to the surface, as shown in PI. XXII, flgs. 17 and 18. 
In one case it was represented by a row of granules, whilst in several 
it was not possible to distinguish anything at all corresponding to it, as 
shown in Fig. 19. 
An axostyle is present, and extends from the region of the nucleus, 
where it seems to be somewhat expanded, in a posterior direction and 
frequently terminates in a sharp spike outside the end of the body, as 
in PI. XXII, figs. 17-20. 
