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The cytopharyngeal ribbons extend far out into the cytosol. Discoidal
vesicles bind to one side of these ribbons. This cell was placed in
HRP which entered vesicles formed at the open cytoproct when spent
digestive vacuoles were defecated. The tubular vesicles are
transformed into discoidal vesicles as they bind to and move along the
anterior side of the ribbons. The spent vacuole membrane is, in this
way, recycled back to the cytopharynx to form new food vacuoles. Two
acidosomes (ac) are attached to a second ribbon but on the
opposite side from discoidal vesicles. EM taken on 7/29/80 by R. Allen
with Hitachi HU11A TEM. Neg. 6,500X. Bar = 1µm.
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