A slide labelled as Triceratium irregulare from the Barbados deposit, Cambridge estate. There is no makers name, but the style looks a bit like that of Laurence Hardman. 40x Leitz Pl Apo NA 1.00 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, brightfield lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 42 images stacked in Zerene (Pmax).
Description published in: Greville, R.K. (1864). Descriptions of new and rare Diatoms. Series XIII. Transactions of the Microscopical Society, New Series, London 12: 87-94, pls XII, XIII. Currently accepted name: Eurossia irregularis (Greville) P.A.Sims 1993: 254.