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 LXI  (links in the Figure numbers point to Lesquereux's descriptions in the text)
Figure
Scientific Name
Reference
1, 2
Halonia tortuosa, Ll. & H.

3, 3a
Halonia flexuosa, Sp. nov.
4
Megaphytum Goldenbergii, Weiss.

5
Halonia pulchella, Lx.
Geol. Rept. of Arkansas, ii, Pl. iii, f.3 in parte.
Lesquereux - Plate LXI