Portrait of the eustigmatophyte, Chlorobotrys regularis West, 1903 (Bohlin, 1901). Spherical paired cells enclosed in a faintly laminated mucilagenous sheath. Multiple parietal chloroplasts. The red spot (visible in the upper cell here) is an oil globule. Collected from a freshwater pond near Idaho City, idaho. June 2005. DIC.