File:A monograph of the terrestrial Palaeozoic Arachnida of North America progress Page66 fig 67 frame.png
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A_monograph_of_the_terrestrial_Palaeozoic_Arachnida_of_North_America_progress_Page66_fig_67_frame.png (362 × 532 pixels, file size: 74 KB, MIME type: image/png)