XXVIl] BLECHNOXYLON 511 



of a reticulum of anastomosing veins can no longer be considered 

 a fatal objection to the suggestion that the Australian type 

 may be a species of Olossopteris. If the view that Blechnoxylon 

 is not a distinct genus is correct, the occurrence of secondary 



Fio. 344. Glossopteris retifera. (Nat. size. From Arber, after Feistmantel.) 



xylem is favourable to the opinion already expressed that 

 Glossojiteris is more likely to be a Pteridosperm than a true fern. 



