— 531 — 
under the same varietal name, correspond fairly well with some of 
our Brazilian specimens, and there is no room for doubt as to their 
specific identity. But as is indicated by the figures, the greater part 
of our material approaches more closely to the form described hy 
Feistmantel as Gangamopteris major (1) which Arber makes a variety 
of Gangamopteris cyclopteroides. The nomenclature of our species 
is a little complicated and requires a few words of explanation. 
If Gangamopteris obovala is specifically indistinguishable from 
Gangamopteris cyclopteroides, as according to Saward and Arbar 
seems to be the case, the former name, having priority, must 
prevail in its application to the species. The variety attenucta, 
if really distinguishable varietally from the typical Ganyamopteris 
obovata is to be appended as a variety under the latter. It is dou- 
btful whether the variety major can be separated even varietally 
from the typical Brazilian leaf. On the other hand, the typical or 
original Gangamopteris cyclopteroides, which I have not been able 
to recognize in our specimens, may possibly be found to be a form 
varietal, sub-specific, or formal in rank. 
So great is the polymophy in the leaves of Gangamopteris that 
it is hardly improbable that the very large typical Indian type will 
eventually be found in Brazil; yet Iam disposed, for the present at 
least, to regard it as not less than varietally distinct from that 
shown in Plate VIII. 
The changes required by the rules of nomenclature do not 
affect the important and interesting fact of the occurrence of iden- 
tical forms of this species in Asia, Australia, South America and 
Brazil. 
Localities : Northeast of Minas, Santa Catharina, about 55 meters 
above the granite, or 225 meters below the Iraty black shale. 
Lot. 3586. and 3921. 
Estrada Nova, near Minas roof of the Barro Branco coal about 
175 meters above the granite, or 105 meters below the Iraty black 
shale. Lot. 3589. 
Roof of the black shale, 6 meters above the granite, 4 kilo- 
meters (492 kilometer Post) east of Suspiro, Rio Grande do Sul Lot. 
3592. 
1) See, in particular, Feistmantel, Fl. Gondwana Syst., vol. ili, p, 44, pl. siv 
fig. g and pl. XVI fig. 4, 2, 
