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Records of the Geological Survey of India. 
[VOL. x. 
and that excepting in the section on the banks of the Nunia,* the want of it can only be 
made out by a careful comparison of the rocks of each formation over considerable areas."’ 
And Mr. Oldham, in his paper mentioned above, says about this unconformity :—“ The 
unconformity between them (Raniganj and Panchet groups) is hut slight (in truth, such 
as would never probably have been noticed were the change, from one group to another, not 
marked by a change in mineral characters of rocks), etc.” I went myself twice through this 
part of the Nunia stream, and I could only observe this apparent conformity, and the 
co-existence of Schizoncura and Glossoptcris in these beds, and therefore their close connec¬ 
tion with the Raniganj group cannot, I think, he denied, whatever may he the differences in 
mineral characters. 
Amongst the fragments of Glossoptcris which I mentioned above in the specimens of 
the Panchet locks, there are easily seen two different forms of areolation: one is that of 
Glossopterts inchca, Sehimp., and the other of my Glossopteris communis. I may thus 
record the fact that Glossoptcris occurs in two forms in the true Panchet rocks, together 
with Schizoneura and Fsthcna, connecting the Panchet group more closely with the Rani¬ 
ganj group than I supposed before. 
But I have also to notice the occurrence of Glossopteris in the “ upper series ” of the 
Gondwana system,—in the Jabalpur group and in the Denwa groups. 
There are some specimens from the Sher river amongst our Jabalpur fossils; one of 
these I described as Cyclopteris lobata, comparing it with the Cyclopt. digitata from the 
English Oolite; but it is also very close to those forms which only recently were described by 
Heer from Middle J urassic (oolitic) strata in Greenland and Eastern Siberia as Ging/co, to 
which also Cyclopt. digitata from Yorkshire was placed, and it would be the case also with 
our form. On the reverse side of this specimen I discovered the first specimen of Glos¬ 
sopteris; by splitting the stone I uncovered another leaf of this genus. 
There is another specimen with Alethopt. Whitbyensis, Gopp., also from the Sher river, 
which contains also two leaf fragments of Glossoptcris. Although fragmentary, the exist¬ 
ence of the genus Glossopteris in the Jabalpur (Each) group is unmistakably proved. 
In 1875 Mr. H. B. Medlicott brought from the Denwa horizon (Mahadeva Series! of 
the Satpura basin near Kesla, some specimens of a very crumbling rock with fragmentary 
plant-remains, amongst which is a leaf, the venation of which is areolated, and which I can 
only believe to be a Glossopteris, with which also the whole form of the leaf agrees. I have 
no intention to determine the species ; I am satisfied with the generical determination. By 
these discoveries, I think, Glossoptcris loses somewhat of its “ exclusive carboniferous 
character,” which in Australia is given by the marine fauna, while here in India I believe it 
to be mesozoic. 
On tee occueeence of ebbatics in the Potwae, and the deductions that must 
be deawn heeefeom, by W. Theobald, Geological Survey of India. 
As my assertion of the former extension of glaciers to so low a level as 2,000 feet in 
the KAngra Yalley has found scarcely more favour at the hands of my colleagues than from 
the author of Fire andFrost (vide 3. K. S. B., 1877, Part II, No.l.,p.ll), it is some satisfac¬ 
tion to me now to produce additional evidence tending to the same conclusion ; and if I am 
not mistaken, less open to the destructive criticism of experts than were my rather crude 
observations in Iiangra. 
* The above-mentioned specimens, with Estliena, Schizoneura, and Glossopteris, are from here. 
