1881.] fossils of the Indian Gondwdna system* 193 



Order Dictyopteuide.i;. 

 The most prominent group of fossils in this order belong to a genus 

 equally well represented in India and in Australia (Victoria) in beds of 

 about the same horizon. 



Genus Gangamopteris,* McCoy. 



1875. McCoy Prodr. Pal. Victoria, Dec. II, p. 11. 



Like Glossopteris, this genus is composed of leaves with a net-venation 

 but without a midrib, all the veins radiating from the base into the leaf. 



It is of frequent occurrence in the Lower Gondwanas in India but in 

 a reversed proportion to Glossopteris, being most frequent in the lowest 

 groups (Talchir-Karharbari) of that portion. 



We know the following species : 



Gangamopteris cgcIopteroides,f Feistm. 

 1879. Feistmantel, Pal. ind., G-ondwana Flora, Vol. Ill, Pt. 1, p. 12, Pis. VII, 

 IX, XI, etc. 



A very abundant species. 



Lower Gondwanas : Talchir shales of the Karaun (Deoghur) and Ka- 

 ranpura coalfields; Karharbdri beds of the Karharbari and Mohpani 

 coalfield. 



Of this species I have also described many varieties, occurring in one 

 or the other of the above groups or both ; but it is not necessary to repeat 

 them here. 



Gangamopteris buriadioa,% Feistm. 

 1879. Feistmantel, 1. o., p. 15, PI. XVIII, fig. 1-2. 

 Lower Gondwanas : Karharbdri beds, Karharbari coalfield. 



Gangamopteris major,§ Feistm. 

 1879. Feistmantel, I. c, p. 15, PL XIV, 3, PI. XVI, fig-. 1-2. 

 Lower Gondwanas : Karharbdri beds, Karharbari coalfield. 



Gangamopteris angusiifolia,\\ McCoy. 

 1879. Feistmantel, I. c, p, 16, PI. IX, fig. 5. 



Lower Gondwanas : a. Talchir shales, in the Deoghur and Karanpura 

 coalfields ; b. Karharbdri beds, in the Karharbari coalfield. 



This species also occurs in Australia in the upper coalmeasures (N. 

 Castle-beds) and in the Bacchus-Marsh sandstone, Victoria. 



* Gangamon (gr) = a small net ; pteris = a fern. 



f Like Cyclopteris. 



% From the locality Buriadi, Karharbari coalfield. 



§ Larger. 



II Narrow-leaved 



