An arrangement of Cyclotella striata from Hulstein (?, if this is right, I think it is in the Netherlands). Prepared by Johann Diedrich Möller. 40x Leitz Pl Apo 1.00 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 46 images stacked in Zerene (Pmax).