Campylodiscus eximius from France. Single example on the slide, and it is not ‘face on’. Mounted in Hyrax, very yellow mountant, and some issues with it. Broken pieces of a coverslip used as spacers. Prepared by Flatters and Garnett Ltd. Olympus BHB microscope using 450nm LED light. 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. 124 images stacked in Zerene (Pmax).
Campylodiscus eximius W.Gregory 1857. Published in: Gregory, W. (1857). On new forms of marine Diatomaceae found in the Firth of Clyde and in Loch Fyne, illustrated by numerous figures drawn by R.K. Greville, LL.D., F.R.S.E. Transactions of the Royal Society of Edinburgh 21: 473-542, 6 pls [IX-XIV]. Page 503, Plate XI [11], Figures 54, 54b.