Biddulphia lata from Oamaru, New Zealand. Single incomplete example on the slide. Prepared by Samuel Henry Meakin. Mounted in Styrax and dated January 1940. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo NA 1.40 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, brightfield lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera.
Biddulphia lata is described in the Journal of the Quekett Microscopical Club – Grove, E. & Sturt, G. (1887). On a fossil marine diatomaceous deposit from Oamaru, Otago, New Zealand. Appendix. Journal of the Quekett Microscopical Club, Series 2, 3(19): 131-148, plates 10-14. The diatom is Number 53 on Plate 14 (XIV). Relevant pages and plate shown above.