Two examples of Coscinodiscus diorama from Colon. Shown in Schmidt’s Atlas Plate 64, Figure 2. I think the current name for this is Coscinodiscus diorama var. diorama. Prepared by Arthur Cottam. Olympus BHB microscope using 450nm LED light. 20x Nikon Plan Apo NA 0.65 objective. Olympus Aplanat Achromat condenser, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 24 images stacked in Zerene (Pmax).