» ado => a FLE Sask To T 
EPE 2 20 ee À = à 
y RN ae 
| pa vd 
> = 
RLS etes 
times double chromatic granulation, the ble- 
pharoplast, from which start three anterior, 
slender, equal and free flagella; the recurrent 
flagellum also emerges from it, or froin its 
posterior corpuscle when there is one; the 
recurrent flagellum is attached to an undu- 
lating membrane and a rib forming the base 
of the latter. The undulating membrane ge- 
nerally has from 5to 7 undulations and the 
much bent rib which follows the surface of 
the body accompanies it in two thirds of its 
-circumference. 
Dimensions: Length 16—17 u Width 
6-8. 
Habitat: Coecum of Cerodon rupestris. 
Trichomonas tatusi FONSECA 1935. 
Description: Body ovoid or rounded, 
Length about 10 u. Width 6. Very metamor- 
phic. 
Protoplasm finely alveolar, difficult to 
separate, in an extremely narrow periplastic 
layer and endoplasm containing few inclu- 
sions. 
Cytostome anterior, contiguous with the 
nucleus, narrow, cleft-like. Axostile pro- 
minent outside and seen in fresh specimens. 
In the nuclear area, there are only more or 
less irregular chromatic granulations, be- 
tween the cytostome and the undulating mem- 
brane. 
Three anterior, free, equal, and extre: 
- mely slender flagella start from the blepha- 
roplast; they arelonger than the body; there 
is also a recurrent flagellum beginning at the 
blepharoplast, which is attached to a very 
delicate undulating membrane with broad 
and shallow ondulations; it covers about half 
the outline of the body and ends in the 
form of a long free flagellum. The rib on 
which the membrane rests also comes from 
the blepharoplast; it is a narrow ‘chromatic 
streak following the surface of the body, 
where it is covered by the undulating mem 
brane. 
I have been able to watch the 
versal division of Tr. tatusi. 
trans- 



Waskia Wenyoni FONSECA, 1917. 
Brazil-Medico, vol. 31, n. 49, p. 416. 
In 1915, while already studying parasitic 
protomonadinae, I came across several species 
of Entamoeba, Chilomastix, Trichomonas, 
Giardia etc, in a large brazilian monkey, 
Cebus caraya HUMBOLDT. Among them I 
found an interesting diplozoon, of which I 
studied many specimens, following some of 
them for a long time. As I wished to obtain 
sufficient material so as to be able to observe 
the nucleo-flagellar apparatus after staining, I 
put of publishing the description. The recent 
publication of a paper by Wenyon & O’Con- 
nor in the Journ. of theR. A. M. C., in 
which they describe a new flagellate of man, 
has induced me to change my mind. 
To my great surprise, the descriptions 
and illustrations given, correspond to the 
general organisation of a simple form of the 
above mentined diplozoon; there were also 
double forms described by Wenyon & O’Con- 
nor, who consider them as phases of divi- 
sion. All the morphologic elements of their 
single forms are quite like those of the single 
form found in the monkey. I am consequen- 
tly sure that the double forms can not 
belong to another genus; I found no double 
forms of the species I now describe, but 
they may be found later on. The morpholo- 
gic differences between my, species and that 
described by Wenoyon & O’Conner, are 
however enough to prove that it is not the 
same. Consequently I considered mine as new 
and described it under the name of Waskia 
Wenyoni. 
Recently CHALMERS & PEKKOLA 
affirmed that this genus is only a synonym 
of Embadomanas Mackinnon. 1 feel abie to 
deny this as I have observed both genera. 
Redescription: The studied material was 
fresh; it was found in the coecum of 
Cebus caraya; we do not deal with the 
aucleo-flagellar apparatus, but only give the 
external morphology and the position of 
the flagella. 
The body is not elongate as in W. in- 
testinalis, but heart-shaped or round. The ante- 
