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Another view, ventral to Fig. 16, of the cytopharynx (cp) and
its nascent food vacuole (nfv) forming region. The flattened
pharyngeal vesicles (disc) that may contain monolayers or
bilayers of lipids seem to be equivalent to the discoidal vesicles of
Paramecium that provide membrane for food vacuole growth. They
approach and fuse with the cytopharyngeal membrane (arrows)
between the lamellae (l) (cytopharyngeal ribbons). bact,
bacteria; con vac, concretion-containing vacuoles; bc,
buccal cavity; al, alveolus; * asterisk, planar view of a
“discoidal (pharyngeal) vesicle.” EM taken on 7/29/67 by R. Allen with
Philips 200 TEM. Neg. 9,000X. Bar = 0.5µm.
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