A dictionary of the fossils of Pennsylvania and neighboring States

Named in reports and catalogues of the Survey

Compiled for the convenience of the state by J. P. Lesley, state geologist. 3000 figures, mostly facsimile copies of those published by H. D. Rogers, Hall, Conrad, Vanuxem, Emmons, Logan, Dawson, Billings, Matthews, Hitchcock, Newberry, Meek, Collett, Worthen, Rominger, D. D. Owen, Cox, Lyon, Safford, Fontaine, Lesquereux, Wolcott, Leidy, Cope, and others, and some new species, drawn and described by G. B. Simpson