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C. H. MARTIN AND MUR [EL ROBERTSON. 
line connecting the blepharoplasts is transverse to the longi- 
tudinal axis of the animal, as in the first case, but the new 
line grows out at right angles to the old line, the initial 
stages of division may be described as oblique (PL 11, 
figs. 25-27). 
As regards the details of the division process, there seems 
to be a complete harmony between all three methods, though 
at the same time there is clearly a certain amount of time 
variation in regard to the various details of this process even 
in specimens undergoing a similar type of division. The 
general behaviour of the blepharoplast complex and the chro- 
matic line has already been noted above, but it is necessary 
here to point out that we are completely in the dark as to the 
manner in which the chromatic blocks get re-arranged in the 
course of division. There seems to be some reason to believe 
that in the early stages of division the chromatic blocks 
become scattered throughout the cytoplasm, but it is quite 
clear from PI. 11, figs. 21 and 24, that in the later stages of 
this process they have again attained their characteristic 
position under the base of the membrane flagellum. 
The new membrane flagellum seems to grpw out rather 
rapidly from the new blepharoplast at some fairly early period 
in the division process. The behaviour both of the membrane 
flagellum and the chromatic blocks during division present 
very sharply marked differences from the behaviour of the 
similar structures in Trichomonas Ebert hi during this 
process. The two new free flagella in each of the division 
products grow out as rather thick, black processes from the 
blepharoplast complex. The stage at which this grows seems 
to show a certain amount of variability (see PL 11, figs. 28 and 
26). The band joining the divided blepharoplasts seems to 
act as a sort of guide to the division of the nucleus, since it 
is always parallel to an imaginary line joining the two new 
nuclei; in fact the relation between the band joining the 
blepharoplasts and the dividing nuclei seems to be a very 
intimate one, and to have certain points of resemblance to 
some of the phenomena seen in the mitosis of a typical 
