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Some accessory microtubules (arrows) from the proximal ends of
membranelle basal bodies extend upward and curve over the left wall of
the buccal cavity (bc) as can be followed in this micrograph.
Some fibrous components (the posterior connectives, see Smith and
Buhse, Trans. Am. Microsc. Soc. 102:264-271, 1983) from the
membranelles pass into the specialized cytoplasm (sc) where it
forms an electron opaque mass as also can be seen in figure 27. The
bottom of the buccal cavity bordered by oral ribs (or) opens
through the cytosome (cyt) into the nascent digestive vacuole
(nfv). The cytopharynx (cp) is the site of lamellar
microtubules (1 or 2 microtubules per lamella) which direct flattened
vesicles (disc) to the growing vacuole’s fusion site. EM taken
on 8/16/67 by R. Allen with Philips 200 TEM. Neg. 12,400X. Bar =
0.5µm.
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