Aulacodiscus sp., 12 processes. Single example on the slide. No location or mountant details (but the slide is low contrast, so I suspect it is Canada Balsam). ’08 on it so presumably 1908. Prepared by James Doke MacPhail. Olympus BHB microscope using 450nm LED light. 20x Nikon Plan Apo 0.65 objective. Olympus Aplanat Achromat condenser, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 33 images stacked in Zerene (Pmax). Approximately 348µm diameter, measured in ImageJ. Needed much more sharpening than usual for the 20x objective.