A slide labelled as Triceratium septangulatum (current name Triceratium grande var. septangulatum). Single example on the slide. Recent. Prepared by Arthur Charles Cole. Olympus BHB microscope using 450nm LED light. 20x Nikon Plan Apo NA 0.65 objective. Olympus Aplanat Achromat condenser, brightfield lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 38 images stacked in Zerene (Pmax).