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Fig. 7: parasomal sacs and surface microtubular ribbons

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 the basal body. Parasomal sacs (ps) can penetrate the pellicle on both sides of the dikinetids. mu, mucocyst; per, peroxisome. EM taken on 6/3/69 by R. Allen with Philips 300 TEM. Neg. 14,800X. Bar = 0.5µm.
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