BOTANY: E. W. BERRY 
333 
gressively reduced during the history of the phylum. Sporangio- 
phoric and strobiloid. Homosporous and heterosporous. 
Class Sphenophyllae-Sphenophyllales 
I' Pseudoborniales (Nathorst, 1902) 
\ ^ . ^ r Calamariaceae 
^ T . Calamariales { ^ 
Class Calamariae ^ [ rrotocalamariaceae 
I (Potonie, 1899) 
[ Equisetales 
Phylum Pteridophyta (emended to correspond to the Filicales). Berry, 
1915. 
Megaphyllous; phyllosiphonic ; fructifications on but little modi- 
fied foliage leaves, never strobiloid; prevailingly homosporous. 
Heterosporic and quasi spermophytic in certain highly special- 
ized Paleozoic lines, and in existing Hydropterales. 
Class 1. Coenopteridae (kolvSs, common or general, in allusion 
to their generalized characters). Seward, 1910* 
f Ophioglossales 
Class 2. (?) Eusporangiatae -{ Marattiales 
[ Psaronius (Pecopteris) , etc. 
' Osmundales 
Gleicheniales (?) 
Matoniales (?) 
Polypodiales, 
including Hy- 
menophllaceae, 
Schizaeaceae, 
Cyatheaceae, 
Parkeriaceae, 
Polypodiaceae. 
Class 3. (?) Leptosporangiatae, or Eufilicesf 
Class 4. Hydropteridae 
Hydropterales 
Sagenopteralesf 
* The Inversicatenales of Bertrand (1909) and the Primofilices of Arber (1906). 
t Probably has additional fossil representatives. 
J The subdivisions of this class are tentative. 
