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Triceratium antarcticum from Commonwealth Bay, Antarctic Sea. Single example on the slide. Prepared by Samuel Henry Meakin. Mounted in Styrax and dated September 1943. 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. 26 images stacked in Zerene (Pmax).