293 
plasm and then with a “ blepharoplast." In some cases the granules 
and connecting filament can be discerned in the line even before the 
constriction becomes visible; in two or three specimens a wavy blue 
line was associated with the “ line ” (figs. 38, 46, 62). We make no 
suggestion concerning its nature. The further development of this 
process was seen in only one specimen (fig. 44), here the two halves 
of the line are widely separated. The proximal extremity of each 
is capped by a dark granule and surrounded by diffuse chromatin 
material, while between them runs the faint axial filament, whose 
apparent origin has been described. 
The process as thus observed seems comparable to the first stages 
of the formation of motile apparatus in the trypanosome-like stage of 
Haltertdium (Hcenioproteus) noctuce , Schaudinn. The possibility 
suggests itself that the formation and transverse division of the 
"line” may represent the third division of nuclear material described 
bv Schaudinn, and that the axial filament may represent the flagellar 
apparatus of a future trypanosome. Unfortunately, our specimens 
permit us to go no further than merely to suggest this hypothesis. 
Since line formation occurs in parasites of all sizes, it is a process 
common to all ages of the parasite. This is also true of the develop¬ 
ment of the trypanosome-like, motile stages of Hcemoproteus , and is 
another point of resemblance between these two processes. 
Objections to this interpretation of the line formation are: 
(0 None of the smallest trypanosome-like or spirochaete-like stages 
representing the motile stage of the youngest intracorpuscular 
parasites were seen. This is strange in a bird so heavily infected. 
The trypanosome which was present (described below (figs. 29 and 
1°))- if it has any connection with the leucocytozoon, probably 
represents the motile stage of a mikrogametocyte. 
(2) Forms (figs. 45, 46, 63, 64) in which the length of the line has 
,e come much extended do not seem to harmonize with this hypothesis. 
Advanced stages of transverse division of the line were seen but 
rarely (figs. 26 and 44 are unique). 
The line may lie in any position. It may be connected with its 
nu( Teus at its centre or by one end (figs. 45 > 74 )- Although it is 
usually almost totally in the endoplasm of the parasite, its extremities 
nia V extend into the ectoplasm (figs. 39 - 4 ^> 74 )- According to the 
ln which the parasite has dried on the slide the line may be at 
