Fics. 1-6. 
6, 
BGA a xed: 
ASPIDIUM FREDERICKSBURGENSE, SP. DOV ---------- cece o0 00 ccccne sncece encnss cess 
. Portion of the frond, or of a very large compound pinna..-.-.-.------------------- 
4, Magnified pinnule from the lower part of 1, showing nervation....---------------- 
. Portion of a compound pinna from the lower part of the trond, showing lobed and 
Hoothed pinnUleEs eee sects ote eela a lea mere lela ee ao lele elle lal ee loans l= elaine mina 
, Magnified pinnules of 2....----..--- -----+ 2-22 2+ eee eee cee eee eee cee eee eee 
. Fragment of a large pinna, or of the frond, showing toothed pinnules...---------- 
. Magnified pinnules of 3 ..-....-.--- ---- ee 22 22 eee nee ee ee eee creer eee 
. Fragment of an ultimate pinna with unusually large toothed pinnules. ..-.-..----- 
. Magnified pinnuleof 4..........---- --- 2-2 ---- eee eee een eee ene cece cert 
. Fragment of an ultimate pinna with broad crenate pinnules .----.---------------- 
5%. 
6. 
Magnified pinnule of 5, showing nervation..-..--..------------ +--+ -+++-+++--0s000-+ 
Fragment of a pinna with unusually long erenate pinnules, probably from the upper 
part of the frond .-.-..------.----+ -- +--+ ee 2-22 eee cee eee reece cree ces 
Pinnule of 6 magnified to show nervation .-.--. ROSES OBECOd Beno ceUECoioOnSSasCerS 
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