Professor Paul Bertrand has generously given his 
opinions and advice on my specimens. He has verified 
the identifications of Taeniopteris jejunata, Odontopteris 
genuina, Pecopteris daubreet and Odontopteris reichi. 
The plant recorded here as Diplotmema ribeyroni 
Zeiller” is a common form which attains its maximum 
of abundance in the Lower Monongahela. The American 
specimens have been erroneously identified with Pseu- 
dopecopteris cordato-ovata Weiss. Lesquereux based the 
reference of a number of specimens to the species defined 
by Weiss on material from Pottsville. Due to an error 
in the Coal Flora the locality was considered to be Wilkes 
Barre instead of Pottsville. In the earlier years of inves- 
tigation Lesquereux did not distinguish between Pseu- 
dopecopteris sillimannia and Pseudopecopteris cordato- 
ovata. Consequently his tray labels read ‘‘Wilkes Barre 
and Pottsville.’” The original manuscript catalogue gives 
the locality of the specimen figured on plate 37, figure 4 
of the Coal Flora as Salem Coal, Pottsville, Pennsylvania. 
David White described Mariopteris occidentalis” 
from the McAlester Coal Field and in comparing the 
plant figured by Lesquereux, cited it as Mariopteris 
cordato-ovata Weiss, Lesqx. The two species are dis- 
tinet, Mariopteris occidentalis White is of Cherokee 
(= Allegheny) age. 
The true nature of these specimens was recognized 
by Zeiller who included Pseudopecopterts cordato-ovata 
Lesquereux, non Weiss, in the synonymy of Diplotmema 
ribeyron. He cited figure 4, plate 87 of Lesquereux. 
This figure is rather poor. The basal heteromorphy of 
the pinnules, a character which at once distinguishes it 
“ Fl. foss. Autun et Epinac p. 37. pl. 9A. fig. 1. See also Fl. foss. 
Commentry p. 91. pl. 4. figs. 3-5. 
° U.S. G.S. 19th. Ann. Rept. 1899. pp. 480-483, 
[147 ] 
