PLATE XXVIII. 



PAGE 



Figs. 1, 2. Cladophlebis parva Fontaine 250 



Specimens from Vinegar Hill, Maryland (after Fontaine). 



Figs. 3, 4. DiCKSONioPSis vernonensis (Fontaine) Berry 237 



3. Fruiting specimen. White House Bluff, "Virginia (after Fontaine). 



4. Arlington, Maryland (after Fontaine). 



Figs. 5, 6. AsPLENioPTERis PiNNATiFiDA Foutaino 265 



5. Fruiting specimen from Fredericksburg, Virginia. 



6. Pinnules of same. X 4. 



527 



