EA OS EE 
at the same time representants of Embadomo- 
nas MACKINNON of which CHALMERS 
PEKKOLA state that Waskia is only a spe- 
cies. 
Having madea detailedstudy of Waskia 
WENYON and O'CONNOR and Embado- 
monas MACKINNON, in another paper, pre- 
sented on the same occasion, I refrain from 
it here. Though not based on the type species, 
my studies on other species of the same ge- 
nera fully confirmed the conclusions at which 
the above mentioned authors arrived. The 
protomonadinae of thegenus Embadomonas 
have one flagellum, which starts from the 
blepharoplast, and a cytostome with chromo- 
philous lip and delicate undulating membra- 
ne. Those of the genus Waskia are simple 
or double and have, accordingly, one or two 
cytostomes near which appears a thick un- 
dulating and a longer and more slender, not 
undulated flagellum. 
Genus Tetrachilomastix FONSECA, 1915. 
Diagnosis: Protomonadina with four 
equal anterior flagella, springing from the ble- 
pharoplast, which is also the starting point 
of a chromophilous lip, that bordes the cvtos- 
tome, which has an undulating membrane. 
Type species: 
Tetrachilomastix Gallinarum (MARTIN 
& ROBERTSON, 1911). 
Synonyms: Chilomastix gallinarum 
MARTIN & ROBERTSON, 1911, in Quart. 
J. Micr. Sc. vol. 57 pp. 73-5. 
Chilomastix (Tetrachilomastix gallinarum 
MARTIN & ROBERTSON 1911) FONSECA 
19:55 & 1916. 
Redescription: General appearance like 
that of any other Chilomastix; body pear- 
shaped, often twisted and flattened; anterior 
extremity much more dilated than the rest 
of the body; posterior end sharp pointed, 
with a tail like appendix; sometimes there 
is a large diagonal furrow resulting from 
the torsion of the organism. Near the an- 
terior end a broad fissure which ends in 
a sac, the cytostome, crossed by an un- 
dulating membrane which though readily 
seenin fresh specimens is hardly visible after 
staining by HEIDENHAINS method. Cytos- 
tomatic margin followed by a very chromo- 
philous thickening, that starts from the ble- 
pharoplast and follows its contours; this is 
the chromophiious lip which characterises this 
genus and its allied forms; blepharoplast an- 
terior to the nucleus, almost at the anterior 
end of the body; it is only in stages appro- 
aching cell-division that several granules 
occur. 
Nucleus vesicular with thick and very 
chromophilcus membrane, round a central 
cavity, which may contain a central caryoso- 
me, a more or less well developed linin net 
and granules of external chromatin; some- 
times, generally when there is no caryosome, 
there are chromatin granules of different 
sizes adhering to the nuclear membrane. 
Protoplasm neatly differentiated in dis- 
tinct but not resistant periplastic layer, show- 
ing slight changes of outline and endo- 
plasm, with more marked, sometimes even 
coarsely alveolar structure; it often contains 
bacteria or other foreign bodies. 
Genus Chilomitus FONSECA 1915 
Diagnosis: More or less elongate fla- 
gellates, with rigid outer coating and four 
anterior flagella which start from the ble- 
pharoplast; at anterior extremity of the 
body, a short cytostome, without undulating 
membrane or chromophilous lip. 
Type species: 
Chilomitus caviae FONSECA, 1915. 
Redescription: The general appearance 
of this flagellate is quite different from that 
of any other type of protomonadina. The 
body is perfectly rigid; this is particularily 
noticeable during life, asthe flagella give it 
a pendulum like motion, a little similar to | 
that observed in Selonomonas. The species 
here described shows a marked dimorphism, 
with two extremes and all the intermediate 
forms. 
