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Plate VI. Fig. I : plant in nat. state and size. ― Fig. 2 : 

 portion of the cross-section of frond ― Fig. 3 : ramulus bear- 

 ing cystocarps, seen from the undersurface, f. ― Fig. 4 ： cysto- 

 carps, -^. 一 Fig. 5 : cross-section of a cystocarp, magd. — Fig. 6 : 

 ramulus bearing tetrasporic sporophylls, seen from the undersurface, 

 magd. ― Fig. 7 : cross-section of a tetrasporic sporophyll, ~ Q . ― 

 Fig. 8 ： apical portion of frond showing the synpodial mode of 

 growth, slightly magd. — Fip". g : portion of a branch showing 

 ramuli in situ, f. 一 Fig. 10 ： diagramatic cross-section of a 

 ramulus showing setaceous processes on both surfaces, magd. 



