Coscinodiscus galapagensis from Oamaru, New Zealand. Single example on the slide. Rather rare. Prepared by Samuel Meakin. Mounted in Sirax, dated September 1943. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo NA 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, slightly closed down iris. 2.5x Nikon CF PL photoeyepiece. Removed 20mm from the extension tubes to increase the field of view. Monochrome converted Nikon d850 camera. 19 images stacked in Zerene (Pmax).