266 Froceedings of the Royal Physical Society. 



valuta (PhilL), a Spirifer allied to S. Usculcaia (Sow.), and 

 Procluctits Clarkei (Eth.). In a small branch of the Bowen 

 Eiver, near the Nebo road-crossing, an interesting section was 

 discovered by Mr Daintree, in which a Fresh- Water Series 

 with three coal-seams, and containing Glossopteris, is overlaid 

 by Productus and Spirifer beds.* At the Pelican Creek, a 

 tributary of the Bowen, a coal-seam of the Fresh- Water Series 

 was overlaid by a coarse-grained sandstone, with casts of shells, 

 and an arenaceous limestone band containing Streptorhynchus 

 crenistria, a shell common throughout all the Lower Marine 

 series. 



Mr Jack writes me i" that he does not see any cause for 

 alteration in the classification of this portion of the Queens- 

 land rocks, adopted by Messrs Daintree' and Etheridge, viz., 

 in descending order : 



a. Bowen Eiver Coalfield Series. 

 Unconformity. 



h. Star Eiver Series (= Mount Wyatt beds). 



? 



c. Devonian Sandstones (Keelbottom and Dalrymple). 



Conformity. 



d. Burdekin Eiver Limestone (=: Fanning Eiver do.). 



" Siluro-Devonian " {Etheridge). 



According to Mr Jack, the Bowen coalfield is divisible 

 into an Upper or mainly Fresh- Water Series, and a Lower or 

 Marine group, both with interstratified coal-seams, and the 

 former with a few well-marked marine bands. Plant remains 

 are common to both, but much more abundant in the Fresh- 

 Water Series, plenty of Glossopteris but no Lepidodendron. The 

 sandstones of both the Marine and Fresh- Water Groups have 

 pockets and nests of pebbles, and sometimes large isolated 

 boulders, highly suggestive of ice action, but perhaps to be 

 accounted for by the presence of large silicified trees found 

 lying horizontally, which may have had something to do 

 with their transport. The silicified wood is present in quan- 



* Daintree, loc. cit., p. 286, fig. 9. 



+ Letter dated "Don River," 6th August 1878. 



