A. C. Coles 
21 
The body of the trypanosome stains deeply blue with Giemsa and in 
some preparations contains vacuoles. Tt terminates abruptly behind, 
ending in a very fine point, whilst anteriorly it gradually becomes thinner. 
The following were the measurements of twenty acbxlt T. vespertilionis-. 
Total length 
19-3 
Posterior end to centre of 
Length of body 
11-7 
nucleus 
7-0 M 
Length of flagellum ... 
T-O 
Width of body 
2-0 
Posterior end to middle of 
Nucleus width 
1-0 
centrosome 
0-75 to 1-5 
Nucleus length 
1-7 
Degenerate Trypanosomes. In the Pipistrelle, examined more recently 
(1913), among the normal trypanosomes were an exceedingly large 
j number of degenerate parasites. These appeared either as swollen 
transparent trypanosomes with large faintly stained nuclei and 
centrosomes, or what was more frequent, as merely the remains 
of a flagellum with centrosome and some debris of the nucleus and 
body. 
Another point of interest was that in numerous films made from this 
Pipistrelle the para.sites were invariably much more numerous in the 
first quarter of an inch of the film. Here they could readily be found, 
whilst in the remaining part of the film, which is usually much clearer 
and more uniformly spread, it required a very prolonged examination to 
detect a single trypanosome. This peculiarity is also more noticeable 
in the case of Spirochaeta, vesperuginis which is subsequently desciibed. 
Trypanosoma talpae. 
I have met with trypanosomes in the blood of five out of eighteen 
moles (Talpa europaea). They were always present in small numbers, 
and although fairly large in size they ai’e not easily detected in .stained 
films. The reason of this I think is that however well the preparation 
may be stained with Giemsa’s solution, the parasites are seldom coloured 
blue; for the most part the whole of the trypanosome assumes a reddish 
transparent tint. 
When found in fresh preparations they were seen to move rapidly 
with the flagellum in front. 
I met with one which seemed to be very much larger than the 
ordinary form, but on careful examination this proved to be two 
individuals attached by their posterior extremity, and might have been 
a dividing form, although in stained films I have met with no signs of 
division. 
