orm. The body contour
is oval, the anterior end being rounded or slightly reduced, the
posterior end usually cut in on the right side. The peristome is
broad but less extensive than in _Euplotes_, and may extend beyond
the middle of the body. Its right edge is convex toward the right
side, extends forward and does not turn again to the right. The
anterior ventral surface has 7 to 8 scattered cirri and just behind
the mouth is a transverse row of large anal cirri. In the sharp
in-cut of the posterior end are three great angular cirri. Two
lateral cirri are placed on the left of the median line between
the mouth and the anal cirri, and usually in a slight hollow. The
contractile vacuole is on the right side in the vicinity of the
anal cirri. The macronucleus is in two parts, each band-form, one
anterior, the other posterior in position. Movement is rapid and
steady. Salt water.

Diophrys (Styloplotes) appendiculatus Stein '59. Fig. 54.

Synonyms: _Styloplotes appendiculatus_ Stein '59; Kent '81;
Quennerstedt '67, etc.

The general form resembles _Euplotes_. Its outline is oval and
regular except at the posterior end on the right side, where there is
a considerable indentation. The frontal margin is characterized by a
row of powerful membranelles, which become smaller at the peristome
and at the mouth they are of characteristically small size. The
ventral cirri are 7 in number. Five of them are in one row from the
anterior end down the right side nearly to the anal cirri; 1 is on
the frontal border between the first two; 1 lies just anterior to the
second anal cirrus from the right side. The 5 anal cirri are large
and powerful and extend some distance beyond the posterior end of the
body. In all specimens observed these cirri curve to the left. Dorsal
to the anal cirri and placed deep into the dorsal pit are 3 large,
sharply curved cirri, which in most cases are fimbriated, but when
the specimens are normal these are pointed and curve abruptly to the
right. Two smaller cirri lie to the left of the group of anal cirri.
The peristome is well-marked by the adoral zone, and upon its right
border there is a row of cilia, and a similar row of cilia runs along
the base of the oral membranelle. The macronucleus is double and
consists of two elongate cylindrical masses lying parallel with
one another. One of these is in the anterior region; the other is
posterior. The contractile vacuole lies dorsal to the anal cirri
and an