[Pboc. Roy. Soc. Victoria, 18 (N.S.), Pt. I., 1905]. 



IV. — Victorian GraptoUtes — Part III.— From near 

 Mount Wellivgton. 



By T. S. hall, M.A., 



University of Melbourne. 



(With Plate VI.). 



[Read 13th July, 1905]. 



The small collection of graptolites here dealt with was found 

 by Mr. E, 0. Thiele at the junction of the riglit niul left 

 branches of the Wellington River, about six miles west of Mount 

 Wellington. The locality was described briefly by him in a 

 paper on Lake Karng, recently read before the Field Natural- 

 ists' Club of Victoria,^ and also in a paper in the present 

 volume.- The country to the south-west and west of Mount 

 Wellington is coloured Silurian [Upper Silurian] on the last 

 issued map of the State, but the fossils here dealt with are of 

 Upper Ordovioian age. Graptolites of about the same horizon 

 have been known for some years to occur at Mount Matlock, 

 35 miles to the north-west, and others have recently been found 

 at the Thomson-Jordan junction, 20 miles Avest. The area, then, 

 of Ordovician is apparently considerable, though it is all 

 mapped as Silurian. The presence of Monograptus, however, 

 in other beds near the Thomson-Jordan junction show that 

 Silurian [Upper Silurian] rocks are present, so that McCoy's 

 reference of certain beds at Mount Matlock to Silurian [Upper 

 Silurian] on what appeared slender evidence may be quite cor- 

 rect.^ Mr. Thiele's papers, above referred to, show that the 

 Ordovician transgresses further east into the Upper Devonian 

 (? Carboniferous) area shown on the map. There is evidently 

 room for a good deal of careful mapping in this rugged and 



1 Victorian Naturalist 22, 1905, pp. 22-31. 



2 A Palaeozoic Serpentine Conglomerate. Proc. Roy. Soc. Vic, 18, n.s. 1905, p. 1. 



3 See Whitelaw, O.A.L. The Wood's Point Goldfiekl. Mem. Geol. Surv. Victoria, 

 No. 3, 1905. 



