An arrangement of three Aulacodiscus excavatus from Ananino, Russia. Prepared by Samuel Henry Meakin. Mounted in Styrax and dated September 1938. Olympus BHB microscope using 450nm LED light. 40x Leitz Pl Apo NA 1.00 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, brightfield lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 40 images stacked in Zerene (Pmax).