SECOND GEOLOGICAL SURVEY OF PENNSYLVANIA - REPORT OF PROGRESS P. ATLAS TO THE COAL FLORA OF PENNSYLVANIA AND OF THE CARBONIFEROUS FORMATION THROUGHOUT THE UNITED STATES BY LEO LESQUEREUX; ©1879

87 Plates and Their Captions: Scans and Webpage ©George Langford III, 2010

Plate XXVIII (links in the Figure numbers point to Lesquereux's descriptions in the text)

Figure Scientific Name 1 - 3a Danaeites Emersoni, Sp. nov. 4 - 6a Alethopteris Gibsoni, Sp. nov. 7, 7a Alethopteris lonchitica, Bt.