XXVIl] 



GLOSSOPTERIS 



509 



Dr Zeiller suggested, is amply justified by the form of the leaf 

 as a whole, by the angle at which the lateral veins leave the 

 midrib, a feature in contrast to the wider angle at which the 

 lateral veins are usually given off in Taeniopteris (figs. 329, 332), 

 and by the similarity to the Indian specimens already mentioned. 

 Several authors have described leaves or leaflets under the generic 



Fig. 343. Blechnoxylon talbragarense, Eth. ; s, scale-leaves ; x, secondary 

 xylem. (After Etheridge. A x 2 ; B x 3 ; C much enlarged. ) 



name Megalopteris^ from Carboniferous and Permian rocks 

 which bear a close resemblance to the South African variety, 

 but in some cases at least Megalopteris is known to be a pinnate 

 and not a simple leaf. The leaf figured by Jack and Etheridge 

 as Taeniopteris sp.^ from Queensland may also be an example of 



1 Dawson (71) A. PI. xvii. ; Fontaine and White (80) p. 11 ; White (95) 

 p. 315 ; Arber (Oo') p. 307, PI. xx. 



2 Jack and Etheridge (92). 



