Transmission electron micrograph (TEM) of transverse section of locomotory flagellum of Lepoclis, within the reservoir, clear 9+2 (as found in all eukaryotic flagella; two central microtubules surrounded by nine microtubular doublets); euglenoid flagella also have a rod of skeletal material that increases the flagellar width; the unit membrane of the flagellum and the reservoir both have a coating of muclage. Magnification: x100,000.