g cilia and becoming a
swarm-spore. Fresh and salt water.

Podophrya gracilis, n. sp. Fig. 65.

Of all the _Podophrya_ that have been described not one approaches
this minute form in the relative length of the stalk. The body is
spherical and is covered with short capitate tentacles. The stalk is
extremely slender, bent, and without obvious structure. There are
one or two contractile vacuoles in the distal half of the body. The
nucleus is small and is situated near the insertion-point of the
stalk. Reproduction not observed. Diameter of body 8 mu; length of
stalk 40 mu. Only one specimen seen.

[Illustration: Fig. 65.--_Podophrya gracilis_.]

Genus EPHELOTA Str. Wright '78.

(Buetschli '88; Ishikawa '96; Sand '98.)

Small to medium-sized and large forms; colorless to brown. The body
is globular or oval or wedge-shape, sometimes quadrangular. The stalk
is variable, sometimes 1 mm. in length. The diameter of the stalk
increases from the point of attachment to the body of the animal;
it is usually striated either longitudinally or transversely, or
both. The tentacles are of two kinds and are usually confined to
the anterior half of the body. Some are long and sharp-pointed
and adapted for piercing; others are short, cylindrical, usually
retracted and capitate, adapted for sucking. Contractile vacuoles
vary from one to many. The macronucleus is nearly central in position
and usually of horseshoe shape, but is frequently branched and
irregular. Reproduction is accomplished by external multiple budding,
usually from the anterior half of the body. Salt water.

Ephelota coronata Str. Wright. Fig. 66.

Synonyms: _Hemiophrya gemmipara_ S. K.; _Podophrya gemmipara_
Hertwig.

The body is spheroidal, ovate, or pyriform, with numerous
sharp-pointed tentacles and a few straight, uniform tentacles. The
stalk is about three times the length of the body and tapers from its
widest part at the insertion in the body to the narrowest part at the
point of attachment. It may or may not be longitudinally striated.
This is one of the commonest of the _Suctoria_ found at Woods Hole.
It is usually present on Campanularian hydroids, but may be found on
algae and Bryozoa.

Length of body 90 mu to 200 mu.

[Illustration: Fig. 66.--_Ephelota coronata_.]

Genus ACINETA Ehr. '33, Buetschli '88.

(Stein '54, '59; Claparede & Lachman '58; Quennerstedt '67; Hertwig
'76; Mereschowsky '79; Entz '84; Kent '81; Maupas '83; Grube