A strew from Bain’s Farm, Oamaru, New Zealand. Fossil marine material, Wide range of species present. Mounted in Hyrax. No makers name, but I think this was by (NBS) Northern Biological Supplies Ltd. Olympus BHB microscope using 450nm LED light. As well as the wider field of view of the strew, I imaged an Asteromphalus vulgaris 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. 35 images stacked in Zerene (Pmax). Underside view with the rim towards the coverslip.
Asterolampra vulgaris Greville 1862. Published in: Greville, R.K. (1862). On the Asterolamprae of the Barbadoes deposit. Transactions of the Microscopical Society, New Series, London 10(2): 41-55, pls VII, VIII. Page 47, Plate 7, Figures 17-25.