170 E. A. MINCHIN. 
In the proctodeum and hinder part of the intestine I 
noted ‘“‘sausage-shaped protoplasmic bodies, apparently 
flagellate, swimming actively” (figs. 124, 125). These were 
perhaps a form of the bacterium already described, as I 
noted others that appeared to be intermediate between the 
two forms. 
In the same regions I noted also in one fly slender thread- 
like organisms, wriggling actively; perhaps spirochetes. I 
never found them, however, in my smears. In one fiy (batch 
of Oct. Ist, 1905, examined Oct. 5th) I noted the red blood 
in the stomach “swarming with small motile bacteria, not 
the large inert forms ordinarily found.” This fly was one 
bred out in the laboratory. 
I frequently found, in the blood taken from tsetse-flies, 
and in my smears, curious bodies apparently of vegetable 
nature; figs. 127-131 show rough sketches from life of these 
bodies; fig. 126 is from a smear, drawn with the camera 
lucida, magnified 2000 linear. As may be seen, they are more 
or less spindle-shaped bodies, sometimes enclosed by a distinct 
membrane, sometimes not; the contents are divided into two, 
four, or more cells, containing each one or two nuclei. The 
nuclei sometimes appear in the living condition as clearer 
spaces, sometimes as darker spots. ‘The colour of these bodies 
in life is greyish with a shghtly greenish or brownish tinge. 
My notion of these bodies was that they came really from the 
solutions of salt or sodium citrate used in the dissections. 
Quite recently examining the blood of a rudd (Leuciscus 
erythrophthalmus) for trypanosomes, in Norfolk, I was 
surprised to find a quite typical example of these organisms. 
In this case the blood, in which no trypanosomes could be 
found, had been taken from the heart of a fish by means of 
a capillary glass tube, which had been previously washed 
through with normal saline solution. Hence there was a 
possibility that the body seen might have come from. the 
salt solution. It may, however, be some form of organism 
inhabiting blood. I content myself with noting the occur- 
rence of these bodies fairly frequently in tsetse-fly preparations. 
