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Anatomy 99
FIGURE 2.67 Transmission electron microscopy image of the photoreceptive system of Ochromonas danica
in longitudinal section, showing the photoreceptor inside the trailing flagellum. (Bar: 0.30 mm.)
FIGURE 2.68 Transmission electron microscopy image of the photoreceptive system of Euglena gracilis in
transverse section, showing the photoreceptor and the PFR inside the trailing flagellum, and the eyespot in
front of them inside the cell. (Bar: 0.50 mm.)
FIGURE 2.69 Transmission electron microscopy image of the photoreceptor of Euglena gracilis in skew
section, showing the regular layer organization of this structure. (Bar: 0.20 mm.)
