260 
Intestinal Protozoa in Termites 
spheres differ remarkably from each other in their length; and they are very 
difficult to count, so that I cannot give a definite figure for their normal 
number. The difficulty is chiefly due to the fact that some of the chromosomes, 
where they are fixed to the sphere, are bent at one or more points; and more¬ 
over, some of them are coiled around each other. The number seems to be 
more than 12. 
While the above processes are going on, both poles of the nucleus become 
gradually thickened and rounded. At this stage the chromosome-formation is 
completed, and a constriction appears at the middle of the nucleus, indicating 
the plane of division (PI. XI, fig. 23). The strand becomes still more elongated 
until it reaches twice or thrice the length of the diameter of the resting nucleus. 
The just divided daughter nuclei are then found attached to its two ends 
(PI. XI, fig. 21). Finally the strand is broken and the nuclei are detached from 
it, leaving the spheres behind, hanging from the nipples by means of their 
threads, with the broken remains of the strand still attached. The mode of 
breaking of the strand is noteworthy. The elongated strand is usually seen 
to be conspicuously swollen in the middle, and it is on either side of this 
swollen portion that the break occurs. Thus the strand is broken into three, 
and its fibrous structure is beautifully demonstrated at the fractured places. 
It is at this stage that the constricted ball on the axial column of the nipple 
is severed, and the division of the nipple is thus completed. The division of 
the nipple is quickly followed by the division of the bell. Complete division 
of the body seems to be effected rather slowly, and individuals with a divided 
anterior portion, such as that shown in PI. XI, fig. 22, are often observed in fresh 
preparations, remaining undivided for some time. In the young animalcules 
soon after division, remnants of the strand and the thread may be seen. 
Unfortunately I could not ascertain the fate of these structures. Reorganiza¬ 
tion of the normal structure in the young seems to be carried on quickly. 
III. Teratonympha. 
An organism with a remarkable structure is found in the Leucotermes of 
both Japan proper and Formosa, and for it I propose the new generic name 
Ter atony mpha 1 . It shows so many peculiarities in its organization that it 
seems at first sight to differ greatly from all the hitherto described protozoa 
of termites. However, when the organization of the head is carefully studied, 
a fairly close relationship can be clearly made out between this form and the 
preceding genera; and the arrangement of its flagella can be homologized 
with that seen in Holomastigotidae. 
The individuals in Leucotermes speratus of Japan proper are somewhat 
different from those in L. flaviceps of Formosa, and the rather slight but 
distinct differences between them can be recognized constantly; so I have 
1 In my original paper in Japanese (1917) I wrote this name as “Ter any mpha ”—an ortho¬ 
graphic error which I now correct. 
