On some parasitic Slagellata 
by 
Dr. OLYMPIO OLIVEIRA RIBEIRO DA FONSECA. 
(With Pl. 11 & 12). 
The present paper contains all my ob- | Chilomastix mesnili (WENYON, 1916). 
servations on parasitical flagellates made 
after the publication of a former article on 
the species found in Brazilian mammals, which 
also appeared in these “Memorias”. Many 
of them were already described in prelimi- 
nary notes, in “Brazil-Medico””, but some of 
them are quite new. Cur first paper was pub- 
lished in portuguese only so. we repro- 
duce the descriptions of new species given 
in it. 
We would also reply tothe objections 
made by some authors, especially CHAL- 
MERS and PEKKOLA, to our views con- 
cerning the subject in discussion. 
The literature, general study of the 
group, technic etc. have already been given 
in former papers, which were also illus- 
tratated; In the way of literature I refer the 
reader to thethesis published by me on the 
same subject in 1915, which also contains a 
general study of the flagellata. 
[.—Reply to a paper by CHALMERS & 
PEKKOLA. 


I publish the following few lines as an 
answer to the paper by ALBERT J. CHAL- 
MERS and WAINO PEKKOLA, who state 
(in Annals of Trop. Med. & Paras., vol. XI, n. 
3, January 1918,) that two genera estabiished 
by me in 1915, are really synonymous. On 
receipt of that paper I forthwith replied 
by a short note published in Brazil Me- 
dico, vol. 32 n. 15, succintely stating my 
reasons for the establishment of separate 
genera and showing the great differences 
between them. At the same time, | expres- 
sed my intention of going into all the details 
of the question in a later paper, so as toar- 
rive at a definite conclusion. | now proceed 
to compare the two species of the genera 
Chilomitus and Tetrachilomastix and am con- 
vinced that this comparison will justify their 
separation. 
I would also defend the establishing of 
the genus Waskia, by WENYON & O’CON- 
NOR (Jj. of the R. A. M. C., vol. 28 n. 2 
& 3), as I have observed representants of this 
genus, even describing a new species, and 
