Stictodiscus californicus f. nankoorensis (written as var. Nankooriensis on the label) from Vavau, Friendly Islands (now Vava’u, Tonga). Two examples on the slide. Prepared by WA Firth. 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. 37 images stacked in Zerene (Pmax). Top view, with the rims downwards away from the coverslip.