Amoeba guttala Duj. Fig. 1.

A minute form without pseudopodial processes, extremely hyaline in
appearance, and characterized by rapid flowing in one direction.
The body is club-shape and moves with the swollen end in advance.
A comparatively small number of large granules are found in the
swollen portion, while the smaller posterior end is quite hyaline.
Contractile vacuole absent, and a nucleus was not seen. Frequent in
decomposing vegetable matter. Length 37µ. Traverses a distance of
160µ in one minute.

The fresh-water form of _A. guttula_ has a vacuole, otherwise
Dujardin's description agrees perfectly with the Woods Hole forms.


[Illustration: Fig. 1.--_Amoeba guttala_.]


Amoeba? Fig. 2.

A more sluggish form than the preceding, distinguished by its larger
size, its dense granulation, and by short, rounded pseudopodia,
which, as in _Amoeba proteus_, may come from any part of the body.
A delicate layer of ectoplasm surrounds the granular endoplasm, and
pseudopodia formation is eruptive, beginning with the accumulation
of ectoplasm. Movement rapid, usually in one direction, but may be
backwards or sideways, etc. Contractile vacuole absent; the nucleus
is spherical and contains many large chromatin granules. Length 80µ;
diameter 56µ.