Auliscus grevillei from Pisagua, Peru. Single example on the slide. Mounted in Hyrax. No makers name, but the style reminds me of JA Long. However I am not sure so will leave it as ‘unknown maker’ for now. 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. 38 images stacked in Zerene (Pmax).
Original description: Janisch, C. (1861). Zur Charakteristik des Guano’s von verschieden Fundorten. Abhandlungen der Schlesischen Gesellschaft für vaterlandische Cultur. Abtheilung für Naturwissenschaften und Medicin. Breslau. 150-164. page(s): p. 163; pl. 2, fig. 11. In this it is spelt Auliscus grevillii.