A strew slide of Amphitetras antediluviana from Guernsey. Described as ‘many interesting views’, and it certainly does that. Prepared by Theodor Ernst Eulenstein, but also has a label by CN Peal, Fernhurst, Ealing. I selected a couple of them for further imaging. 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. Image stacks prepared in Zerene (Pmax) – 49 images for the ‘squarer’ one and 35 for the cross shaped one.
Amphitetras antediluviana Ehrenberg 1840. Published in: Ehrenberg, C.G. (1840). Über noch zahlreich jetzt lebende Thierarten der Kreidebildung und den Organismus der Polythalamien Preprint of Abhandlung der Könglichen Akademie der Wissenschaften zu Berlin aus dem Jahre 1839 [1841] with different pagination. pp. 1-94, 4 pls. Berlin. Page 62 [142 in journal, 1841].