106 ON THE FOSSIL FLORA OF THE COAX DEPOSITS OF AUSTRALIA, 



obtained on the same piece of black shale. It must have been a very- 

 large plant, and grew to immense size, even in the poorest sandy 

 soil. It is found in the Hawkesbury sandstones in very poor 

 sand, and no traces of a vegetable deposit any more than an oxi- 

 dation of the iron around the plant impressions, and in some of 

 the laminations. Fine specimens have been obtained from the 

 sandstone quarries at Dubbo, which is nearly 200 miles from 

 Mount Victoria. 



The following observations are from the Jour, of the Roy. Soc, 

 N.S.W., 1880, p. 113. 



Thinnfeldia odontopteroides, Fstm. (Morr. sp.) (pis. xiv, fig. 5 ; 

 xv, 3, 7 ; xvi, 1 ; ix a, x a, and xi a). — Prof. Morris described in 

 Strzelecki's above/mentioned work a fossil plant from the Jeru- 

 salem basin, as Pecopteris odontopteroides, Morr., without being, 

 however, able to justify this determination. Prof. M'Coy placed 

 later the same species with Gleichenites. Mr. W. Carruthers quotes 

 it from Queensland again as Pecopteris odontopteroides and gave 

 two figures. M. Crepin, who described several specimens from 

 Tasmania, classed it with Odontopleris, and compared it with 

 Odontopt. alpina, Gein., considering the beds from which it came 

 as Carboniferous. But its association, as mentioned before, on the 

 same specimens with Sphenopterts elongata, Carr., leaves no doubt 

 about the correlation of these Tasmanian beds. I could compare 

 specimens from Queensland and Tasmania, and also from the 

 Wianamatta and Hawkesbury beds in New South Wales. The 

 comparison has shown that in the specimens from all the localities 

 there occurs a dichotomy of the frond pretty regularly as in the 

 genus Thinnfeldia, under which name I have described it in my 

 above-mentioned memoirs. For the support of this view I quote 

 its great resemblance to Thinnfeldia crassinervis , Gein., from the 

 Rhsetic beds of the Argentine Republic. 



Dr. Feistmantel calls attention to the fact that this is a charac- 

 teristic species of the mesozoic coal in Australia. It is certainly 

 never found in the Newcastle beds. It is very common as already 

 stated at the Tivoli mine, associated with Equisetum rotiferum, 

 at Bundamba, in fact in all the Ipswich coal basin. It is found 



