616 W. S. DUN. 



From the workings of the Sydney Harbour Colliery no 

 evidence of any break in the sedimentation is observable, 

 there is a direct conformity of the overlying shales to the 

 seam, and there is every reason to consider that in this 

 portion of the basin there is a direct succession, with pass- 

 age beds, between the Permo-Carboniferous and the Narra- 

 been Stage of the Hawkesbury System. 



General sections of the strata passed through in the shaft 

 have already been published, 1 and certain fossils have also 

 been described from the shales forming the roof of the 

 seam. 2 It is noteworthy that a Sohizoncnva (.S. anstralix 

 Eth. fil. = (jondwmioixis. Feistm.) is particularly abundant 

 and that this Equisetal had previously been described from 

 the roof of the Bulli Seam at Bulli. :i 



The first appearance of Scliizoneura was at about ten 

 feet above the coal seam, and Cr/oxxop/cr/x Urmrniami was 

 associated with it about five feet above the seam. At 

 higher levels in the shaft plants of Mesozoic (Narrabeen) 



until we get to the 1,300 feet level when the Thinnfeldia 

 type of vegetation becomes abundantly developed ; and 

 Esther ia was met with at 1,771 feet and 2,350 feet. 



Recently additional fossils have been found in the roof 

 shales and these appear to be of particular interest :— 

 1. Cladophlebis cf. Roylei, Arber. {Plate 49.) 



An alethopterid fern apparently very closely related to 

 ('l'i(h,j,hribis Roylei, Arber, is particularly abundant. 

 Unfortunately no specimens of C. Roylei are available for 

 comparison, but there appears to be little doubt that our 



1 Journ. Roy. Soc. N.S.W.. xxxm, p. 211-219; Ann. Rept. Dept. Mines, 



* Etheridsre, Rec. Geol. Surv. N.S.W., v.htt, vii, pp. :i:H. 2:*.". pi*. »■*• 

 49; Dun, W. S., Proc. Linn. So.:. N.S.W., Vol. xxxvi, 1901. p. 7:iS ; AU'>-, 

 E. A. N., Glossopteris Flora, 1905, p. 5. 



8 Etheridge, op. cit., 1893, p. 74-76, pi. 13. 



