Perrya pulcherrima, recent, from Calais (?, I think that’s what it says). Single example on the slide. Prepared by Arthur Charles Cole. Olympus BHB microscope using 450nm LED light. 40x Leitz Pl Apo NA 1.00 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 45 images stacked in Zerene (Pmax).
Original publication and holotype designation: Kitton, F (1874). New Diatoms. Monthly Microscopical Journal 12: 218-220, pl. 81-82.