Pseudauliscus diffusus from Forrester’s Hill, Oamaru, New Zealand (spelt as Pseudo-auliscus on the slide). Single example on the slide mounted with the underside facing upwards (rim towards the coverslip). No makers name, but by Richard Gosden. 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. 32 images stacked in Zerene (Pmax).
Original description (of Pseudauliscus diffusus Rattray, 1888); Rattray, J. (1888). A revision of the genus Auliscus Ehrenberg and of some allied genera. Journal of the Royal Microscopical Society. 1888: 861-920, 5 pls. Page 907.