PLANE = Vian, 
Fias. 1-7. PECOPTERIS VIRGINIENSIS, Sp. NOV.----. .----+ ------ +--+ -- eee eee et eee eee eens: 
1. Pinna with unusually long pinnules, from Fredericksburg ---.---.----------------- 
1°, Pinnule of 1 magnified to show nervation ...----------------++ -----++-++---+-------- 
2, A compound pinna, or a part of the frond, from road-side near Potomac Run. ..---- 
20, Portion of a pinnule from the lower part of the specimen ieyegeybilstol S656 Seae soca 
2>, A pinnule from the upper part magnified -.....----------++++-2+---220 e222 sere 
3. Pinna from Fredericksburg. ...---------------------22 2-02 eee eee etree ees tte 
3°, Pinnule of 3 magnified to show nervation._...-------- -----+ +---++seeecr reer cree 
4. Pinna from Fredericksburg.---.. ----- ---------+ ¢----- e225 cere cree crt rrr 
5. Upper portion of a pinna from 72d mile-post, near Brooke. -.-------+----------+++-- 
6. Pinna from road-side near Potomac Run ..-.- ---- ---- ------ ---+--+ --2-225 er ret ete 
7, Pinna from road-side near Potomac Run -------------------------+--- «6 oponnoudesSs 
7, Pinnule of the same magnified to show nervation ----..-----++---+ +--+ +--+ +727 77+ 
