A slide showing two examples of a Biddulphia sp. (very tentatively ID’d by me as Biddulphia tuomeyi) from Tamatave. One viewed from above, the other from the side. Prepared by Samuel Henry Meakin, and mounted in Styrax. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, slightly oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 57 images stacked in Zerene (Pmax).