508 



FI LI GALES 



corf. 



in the same way as in Marattia or Angiopteris. Their reference to 

 u Marattiaceous affinity has been further confirmed by the proof of their 



relations with Pecopterid foliage, bear- 

 ing characteristic fructifications. 1 Such 

 stems were not only of arborescent 

 stature, but also of considerable thick- 

 ness. The leaves were in some cases 

 distichous (Megaphytori), in others 

 tetrastichous, in others again spiral 

 on a more complex plan : the latter 

 correspond more nearly to the leaf- 

 arrangement seen in the living genera. 

 The general character of such stems 

 is suggested by Fig. 280. The con- 

 clusion seems clear that certain Fern- 

 like plants, of Marattiaceous affinity, 

 but of more aborescent habit than the 

 living Marattiaceae, existed in Palaeozoic times, a conclusion which is 

 borne out by the study of the leaves and fructifications. 



B. 





FIG. 276. 



Diagrammatic representation of the end of a 

 rhizome of Kaulfussia. iv = wings of stipule; 

 coni = transverse commissure. (After Gwynne- 

 Vaughan.) 



FK,. 277. 



A, young sporophyte of Danuen simplicifolia still attached to the garnet. >phyte. fr. 

 X3- B, an older .sporophyte of the same species. C, gametophyte of Attgiofiteris cvecta 

 with young sporophyte. (A, /, after lirebner; C, after Farmer, from Campbell's A/assfs 

 a nd Ferns.) 



The latter in the modern genera are always intru-marginal, on the 

 lower surface of the leaf : the sori are distinct, seated each upon a vein. 



1 /.ciller, Elements, p. 120. 



