308 
the concave surface at a little distance from the postenor extremity 
anses the flagellum. The margins of the organism are roughly 
serrated. It moves backwards and forwards slowly, now turning over 
on itself and now bending antero-posteriorly. As many authors have 
observed, its rate of progression is very slow. It is, therefore, easily 
watched under the microscope for considerable periods. A side view 
is seen in fig. i 3 , a dorsal view in fig. 2, and a cross section in fig. 3. 
1 . loricatum has a peculiar method of division, which we observed 
most completely in preparations of fresh blood of Rana galamensis , 
kept aseptically at ; 2 ° F. to 8g° F. for two or three days. 
mongst recent authors, Franca and Athias 2 and Bouet 6 have 
parts of the cycle described in this paper. Franca and Athias 2 
presentatives of the type of T. loricatum , in fresh and stained 
P ens, become rounded and, in one case, segment several times. 
ainer specimens they saw a trypanosome of their T. rotator ium 
ype become spherical and divide. They describe most interesting 
.1 ‘ binges in which the blepharoplast seems to play 
describ^ i° f Centrosome ’ and forms suggesting mitotic division are 
1. , ° ' n t * lese same specimens small round parasites, possessing 
I rop ast and nucleus, which may develop two flagella, occurred. 
__ tl b panosome of their 7 . rotatorium type was also present 
F '£ s - 20 and 24 are^nla^gea^oocT diime te^ 1 iC f lly "° UI , actual living s P eciraeD5 - 
ameius, the remainiier 1000 diameters. 
