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Figs. 1-7. Onocela inquirenda (Hollick) n. comb - 32 



8. Gleichenia protogsea Deb. and Etts. '{ . . 31 



9. Gleichenia gracilis Heer? - ^ 



10-13. Thyrsopteris grevillioides (Heer) n. comb - - - 31 



14_18. Marsilea Andersoni Hollick 



19-21. Marsilea Holtingiana SchafT. (introduced for comparison) - 33 



22. Sagenopteris variabilis (Vel.) Vel. ? - 



132 



