This form differs slightly from others of the same species as
described by different observers, the most striking difference being
the presence of two contractile vacuoles in place of the usual one.
These are very slow to fill and grow to a large size before diastole.
The membrane is very tough and retains its form easily under pressure
of the cover glass. Another characteristic feature is the flattening
of the surfaces between the striæ. Decaying algæ.


[Illustration: Fig. 28.--_Lacrymaria lagenula_.]


Lacrymaria coronata Cl. & Lach. '58. Fig. 29.

Synonyms: _L. lagenula_ Cohn '66; Möbius '88; _L. cohnii_ ? Kent '81;
_L. versatilis_ Quen. '67.

Form flask-like and similar to _L. lagenula_, contractile but tough.
The contractile vacuole is terminal, the proboscis is short, slightly
raised and separated from the body by a deep cleft; the buccal cilia
are inserted part way up on the proboscis. Form changeable, from
short, sac-like to elongate and vermiform. Length 85µ.

This species is not very different from _L. lagenula_, but I noted
that in addition to the elongate nucleus, the body striæ are much
more apparent here and seem to sink into the cuticle, giving the
periphery, especially at the collar region, a curious crenulated
effect. The endoplasm is very densely granular and colored a
blue-green, probably from food particles. The number of striæ is much