e freshwater forms.
If I am correct, however, in placing an _Actinophrys_-like form
found at Woods Hole in this species, the description will have to
be somewhat modified. In this form (fig. 5) there is no distinction
between ectoplasm and endoplasm, and there is an entire absence of
vacuoles. The nucleus is central, and axial filaments were not seen.
The single specimen that I found looked much like a Suctorian of
the genus _Sphaerophrya_, but the absence of a firm cuticle and the
presence of food-taking pseudopodia with granule-streaming makes it a
very questionable Suctorian, and 1 place it here until further study
throws more light upon it.

Diameter of body 40 mu; length of pseudopodia 120 to 140 mu.

[Illustration: Fig. 5.--_Actinophrys sol_.]

Genus HETEROPHRYS Archer.

The body is globular with but slight differentiation into ectoplasm
and endoplasm; one nucleus in the latter; contractile vacuoles
one or many; pseudopodia on all sides, thin, and with peripheral
granule-streaming; surrounded by a globular, rather thick coat of
jelly, which is hyaline inside and granular on the periphery. Fresh
and salt water.

Heterophrys myriapoda Archer. Fig. 6.

Synonym: _H. marina_ Hert. & Less. '74.

Diameter 25 to 80 mu; pseudopodia twice as long as the body diameter;
the plasm often contains chlorophyll bodies (Zoochlorella). The
granular part of the gelatinous layer is thick (up to 10 mu). The
spine-like processes are very thin and short. (Schaudinn '95.) The
marine form found at Woods Hole probably belongs to this species,
as described by Schaudinn. The short pseudopodia which give to
the periphery a fringed appearance are quite regularly placed in
connection with the pseudopodia. The latter are not so long as twice
the body diameter, the longest being not more than equal to the
diameter of the sphere. The body inside of the gelatinous covering
is thickly coated with bright yellow cells similar to those
on Radiolaria. The animal moves slowly along with a rolling
motion similar to that described by Penard '90, in the case of
_Acanthocystis_. Diameter of entire globe 35 mu; of the body without
the jelly 18 mu. The extremely fine granular pseudopodia are 8 to 35 mu
long. Common among algae.

This form was probably meant by Peck '95, when be figured "a
heliozooen."

[Illustration: Fig. 6.--_Heterophrys myriapoda_.]

KEY TO ORDERS OF FLAGELLIDIA.

Small, body usually amoeboid; 1 or more Order MO