A high resolution cross section showing only one basal body in two different dikinetids. Cross sections of overlapping microtubular ribbons arising from the dikinetids are seen in the ridges next to t...

A view of early endosomes with coated evaginations at their margins. TEM taken on 8/15/67 by R. Allen with Philips 200 operating at 60kV. Neg. 19,200X. Bar = 0.5µm. The negative was printed to paper ...

A post ciliary microtubular ribbon extends from the proximal left side of the basal body and arches toward the cell surface where it ends near the longitudinal microtubular ribbon at the crest of the ...

Fibers that splay out from a mid piece pass to the pellicle. TEM taken on 4/5/71 by R. Allen with Hitachi HU11A operating at 75kV. Neg. 10,250X. Bar = 1µm. Published and adapted with permission from ...

Quick-freeze deep-etch of granulo-fibrillar material at the crests of the ridges. This material is composed of thinner and shorter filaments that, like the striated bands, appear to bind to the membra...

A high resolution view of a dividing Didinium nasutum. This large ciliate is capable of engulfing Paramecium. It has a thick ectoplasm containing numerous mucocysts embedded in its extensive epiplasm....

A circular depression on the dorsal surface of the cell marks the expulsion site of a contractile vacuole. This is referred to as the contractile vacuole “pore.". Microtubules encircle the pore. Tr...

Fibers that splay out from a mid piece pass to the pellicle. TEM taken on 4/5/71 by R. Allen with Hitachi HU11A operating at 75kV. Neg. 10,250X. Published and adapted with permission from J. Cell Biol...

Striated bands in a transverse ridge (in which kinetodesmal fibers are lacking) at high magnification. The longer band has seven stripes rather than five as in the shorter band. This suggests three re...

11 micrographs are views of a serially-sectioned contracted Vorticella convallaria cell that show the main features of this cell. This figure shows 3 food vacuoles (of a total of about 15 in the cell...