Keywords: Ceratiocaridæ from the upper Devonian measures in Warren County BHL21243285.jpg Ceratiocaridæ from the upper Devonian measures in Warren County by Chas E Beecher Eurypteridæ from the lower productive coal measures in Beaver County and the lower Carboniferous pithole shale in Venango County by James Hall 21243285 69224 26892 Text Photograph http //www biodiversitylibrary org/page/21243285 10 5962/bhl title 26892 Beecher Charles Emerson; Hall James NOT_IN_COPYRIGHT<br> Biodiversity Heritage Library PD-old-70-1923 Ceratiocaridæ from the upper Devonian measures in Warren County Images uploaded by Fæ Files from the Biodiversity Heritage Library |