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A grazing section through the cell’s surface shows segments of six
rows of cilia running across the figure sectioned superfically at the
top and deeper into the cell as one progresses down the figure. Crests
of the polygonal ridges appear at the top of the figure where the
expanded alveoli (al) fill most of the space in the surface
depressions. Septa (s), the borders of adjoining alveolar sacs,
run between basal body/cilium complexes along a kinety. Trichocyst
tips (tt) penetrate into the lateral ridges that separate the
concave depressions of a kinety. Within the cortical cytosol a more
superficial system of striated bands (sb) connects the slopes
of adjacent ridges, laterally, longitudinally and diagonally. Internal
to the striated bands is a meshwork of centrin-containing fibrous
bundles called the infraciliary lattice (il). This meshwork
surrounds the proximal half of basal bodies but does not insert into
the pellicular membranes. Collidine-buffered fixative. EM taken on
7/8/69 by R. Allen with Philips 300 TEM. Neg. 14,800X. Bar = 0.5µm.
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