Type slide, ’28 forms after Van Heurck’s classification XX’. Looks to be predominantly Coscinodiscus sp.. Prepared by Flatters and Garnet Ltd. Linear arrangement, split into sections for imaging. Some movement of the diatoms. Olympus BHB microscope using 450nm LED light. 10x Nikon Plan Apo NA 0.45 objective. Olympus Aplanat Achromat condenser, brightfield lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. Images stacked together in Zerene (Pmax), and pasted together in Photoshop.