A Glyphodesmis sp. (spelt Glyphodesmus on the slide). Single example. Mounted in Styrax and dated March 1973. Prepared by RI Firth. 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. 35 images stacked in Zerene (Pmax).