Stictodiscus johnsonianus from Consett Bay, Barbados. Single example on the slide. Prepared by RI Firth. Mounted in Styrax and dated December 1943. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 27 images stacked in Zerene (Pmax).