DO I 
long" laii-like process which swa) etl iroin side to side as the organ- 
uim tiau'elled lorwards. The w hole parasite frecjuently rolled 
over eohipletely so that it did not müve in anvthing like a 
siraight course. Xo ij'ee flagelluin in active vibration, so charact- 
eristic of herpetoinonas or crichidia, was seen. On examining 
these parasites in an intact mapighian tube, their bodies and the 
long tapering posterior ends were seen to be waving from side 
lo side ; many were grouped together and exhibited ail the stages 
ot simple longitudinal fission. The niotile ends were attached to 
the cells and some appearances suggested that thev had actually 
penetrated into their protoplasm. In addition to these forms there 
were others which were more active, they were tadpole-shaped 
and travelled with tiie tail end tirst ; small round and oval bod¬ 
ies were also seen but they were eniirely motionless. 
A careful examination of the more pointed end in the fresh 
condition and with the highest powers suggested Lhtit it contain- 
ed s(tme organ of locomotion but no definite structure of the 
nature of a flagellum could be made ont. The rapid jerking mov- 
vements from side to side clearly pointed to the existence of a 
contractile band attached by one end to the anterior extremity 
tind bv the other to a point somewhere about the middle of the 
bodv of the parasite. C^n staining these forms with Romanow- 
skv’s stain in the usual way nothing definite could be seen w'hich 
^\■ould account for the movements described above. In a few 
parasites the ectoplasm appeared to be condensed at the sides and 
could be seen as a distinct pink band extending from the point 
to afjout the middle of the cell. These appearances suggested that 
there might be a spécial thickening of the ectoplasmic layer at 
this point oerhaps of the nature of the myonemes of trypanos¬ 
omes. These imperfect pictures were attributed to the fact that the 
parasites were stained after being allow'ed to dry. They were 
next fixed irt nioist films in Schaudinn’s fluid for 48 h. and then 
stained \\ith an exiremely active Romanowsky’s stain for 72 h., 
passed through acetone and mounted in oil under a coverslip. In 
a film prepared in this wa\' almost every parasite showed a dis¬ 
tinct pink band stretching from the pointed anterior end to a 
large pink mass, the blepharoplast. 
l’igure I siu'ws one of these long imotile forms with the point¬ 
ed anterior extremit\ and the long drawn oui posterior (md. Sit- 
uated about the centre of its body the large circulai' blepharo 
