508 



PTERIDOSPEBMS, ETC. 



[CH. 



South Africa, and elsewhere. It has been recognised also by 

 Amalitzkyi in Upper Permian beds in Russia and by Zeiller in 

 the Rhaetic series of Tonkin^. 



Glossopteris angustifolia, Brongniart. Figs. 340, B ; 342. 



It is convenient to retain this designation for linear fronds 

 with an acute or obtuse apex and a venation-reticulum 

 composed of long and narrow meshes (fig. 340, B). It is by no 

 means unlikely, as Arber suggests, that the same plant may 

 have produced leaves of the Q. indica type and narrower fronds 

 which conform to 0. angustifolia. In his description of some 



Fie. 342. Glossopteris angustifolia var. taeniopteroides. ( x 3^.) 



Indian specimens of G. indica, Zeiller draws attention to the 

 variation exhibited in regard to the extent of anastomosing 

 between the secondary veins : some examples with very few 

 cross-connexions agree more closely with Taeniopteris than 

 with Glossopteris as usually defined*. The venation shown in 

 fig. 342 illustrates an extreme case of what is almost certainly 

 a Glossopteris leaf of the G. angustifolia type. This specimen, 

 which was discovered by Mr Leslie in the Permo-Carboniferous 

 sandstone of Vereeniging (Transvaal), has been referred to a 

 variety of Brongniart's species as G. angustifolia var. taeniopte- 

 roides* on account of the almost complete absence of any cross- 

 connexions. The reference to Glossopteris, which my friend 



1 Amalitzky (01). 

 8 Zeiller (02). 



2 Zeiller (03) PI. xvi. 



* Seward and Leslie (08) p. 113. 



