entitled, Fossil Flora and Fauna of
the Pennsylvanian Period, Will County, Illinois by George Langford (1876-1964) Return
Animals of the Coal and Coal;
and Flora and Fauna Publications, pp 86-87. Note:
of the original page 86 is here; page
87 is here.
The original page was letter size
but the image may have been cropped slightly.
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Animals of the Coal; right: Coal Flora and Fauna publications: