The nucleus in nearly every case is elongated and crescentic, with its 
concave side toward the thickened edge of the undulating membrane*, 
and its anterior extremity is pointed. It is i'6/« to 27/t wide. In 
a very few cases it is round, when its diameter is from 3-3/1 to 4-4/! 
(Plate XXV, fig. 3). The undulating membrane is well developed and 
runs in folds from the blepharoplast across the middle of the body, 
from the edge of which it extends about 27/x before the free flagellum 
begins. The structure of the nucleus is more or less complex. Its 
edges are sharply defined, and at its middle are many very small red 
granules. The anterior portion of it is dense and finely granular and 
often contains larger masses of chromatin. In some instances large 
masses cf chromatin are found at both ends (Plate XXV, fig. 2). In 
the fresh this was found to precede division (see figs. 10 and 11 in 
text). 
Numerous forms occur which have a round body, round nucleus, 
blepharoplast close to the nucleus and a short white line extending 
from the blepharoplast, like a short flagellum ; this line, however, 
never extends beyond the edges of the parasite. The line resembles 
the tongue seen in fresh specimens; both occur in rounded parasites 
of about the same size, but we are unable to state their identity. It 
is, however, quite possible that this type of parasite may be a 
de\ elopmental form occurring at about this period and that it may be 
a product of the first dichotomous division of T. loricatum. Differen¬ 
tiated areas of obscure nature are sometimes seen in the nucleus, but 
in none of our specimens have we observed the interesting nuclear 
changes described by Franca and Athias. 2 
1 he observations by Moore and Breinl 8 seem to be of interest in 
connection with the peculiarly elongated " nucleus ” of many forms of 
J- . loricatum. 
In stained smears of kept blood from the same frog, the same cycle 
mi tiplication and development can be followed as mentioned 
a ove in freshly made preparations of fluid blood. In Plate XXV. 
g- c, is shown a parasite rounded and about to cast off its flagellum. 
T. loricatum by”Martin to those described under other names that 
in a frog ( Hyla 1 is verv evident A T? n hzard, and by Marchoux and Salimbem 15 
peculiar in that it had^ nr. < * If P arasite described by the latter authors is 
stained with difficulty or mau^ 1 ® 6 flagellum of 7\ loricatum is often 
and its undulating membrane'' ' G ° Ut ° f Slght beneath the body of the parasite), 
in T. loricatlTnliSTbyTr^l *7 3 T d s P ur which was ^ 
y ranca and Athias (2) nor by ourselves. 
