Cyclotella stylorum from Java (recent). Named as stilorum on the slide. Prepared by Samuel Meakin. Mounted in Sirax, dated August 1939. 3 examples of the diatom on the slide (the main image is of the right hand side one). Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo NA 1.40 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, slightly oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 12 images stacked in Zerene (Pmax).