PTERIDOPHYTA, 



1507 



Carboniferous to the Rhsetic, and is also found in the upper part 

 of the Lower Gondwanas of India (fig. 1372). The leaf has sub- 



Fig. 1371-— Neuropteris heterophylla; from the Coal-measures of Europe. 

 The lower figure shows a single leaflet enlarged. 



orbicular leaflets resembling those of the existing Maiden-hair fern, 

 with no midrib, and the veins numerous and dichotomising as they 

 radiate to the margin. 

 The typical Carbonifer- 

 ous forms, according to 

 Mr Seward, have pinnate 

 leaves, but in the figured 

 Rhsetic form referred by 

 Dr Feistmantel to this 

 genus they are bipinnate. 

 Neuropteridium (fig. 1373) 



is a simply pinnate form occurring in the Lower Trias of Europe, 

 and in the base of the Lower Gondwanas. Dictyopteris includes 



Fig. 1372.— Part of leaf of Cyclopteris pa:hyrhachis ; 

 from the Panchet stage of the Lower Gondwanas of 

 India. (After Feistmantel.) 



