Manuscript entitled, Fossil Flora and Fauna of the Pennsylvanian Period, Will County, Illinois
by George Langford (1876-1964)
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Orthotarbus robustus, Metatarbus triangularis, Discotarbus, Ootarbus and Architarbus rotundatus, page 108-1.
Note: the scan of the original page 108 is here.  The original page was letter size but the image may have been cropped slightly. 
To view any of these images at high resolution (300 dots per inch instead of 100 as on the full-page images) right-click on the image and select
view image.
The links on the top row all point to a second webpage 108 with higher-resolution images of the fossil photographs.
Spider - Orthotarbus robustus.
Orthotarbus robustus, GL photograph, page 108
Metarbus triangularis and Orthotarbus robustus, GL photographs, page 108
Orthotarbus, Discotarbus and Ootarbus, GL photographs, page 108
Architarbus rotundatus and Ootarbus, GL photographs, page 108