Light micrograph of two Phacus sp. protists together with one Lepocinclis spirogyroides protist. Lepocinclis is an euglenoid protist with a red eyespot and helical rows of small warts with several green chloroplasts and some paramylon grains inside the cell. Phacus also belongs to the class Euglenophyceae and forms large, mostly flattened cells with a rigid shell. At the front end of the cell there is a swimming flagellum and usually a red eye spot. The cells have a large nucleus, many chloroplasts without pyrenoids and large paramylon grains as storage material, seen here as round, white structures. The focus plane is on the upper surface of the protist cells to show the striping and small warts. Microscopic contrast technique: Differential interference contrast. Magnification: 950x when printed 10 centimetres wide.