A strew slide from Lake Myvatn, Iceland. Nice range of species. Fossil freshwater material. Mounted in Hyrax and dated 8/1985. Material ex. JR Carter, August 1985. Prepared by Bernard Hartley. Slide number 1808. Olympus BHB microscope using 450nm LED light.
As well as the strew, I imaged one using the 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. 20 images stacked in Zerene (Pmax). Caloneis sp. (C. schumanniana var. biconstricta ? ). See: Foged, N. (1974) Freshwater Diatoms in Iceland Bibliotheca Phycologica, Band 15, J. Cramer, Vaduz, 118 pp. + 36 plates.