310 Ernest W. Skeats: 



resemblance to the Heathootian series. About four miles N. 

 20 deg. W. from the hut on the Limestone Creek, near the head 

 of Horseyard Creek, occurs a band of red jasper rocks interbedded 

 with green schists. 



22. Dunn, U. J. "On Mt. Wellington Corundum." "Mining 

 Standard," October 16th, 1907. Mr. Dunn briefly describes the 

 relations of the corundum to the serpentine area and the 

 relations of the serpentine with the U. Ordovician shales. 



23. Hall, T. S. "Excursion to Mt. William, Lancefield." 

 "Victorian Naturalist," Vol. XXV., No. 1, May, 1908, pp. 9-11. 

 In this account Dr. Hall records the silicification of the shales of 

 the Lancefield beds near the disused Mt. William railway station, 

 and states that the shales high up on the flanks of Mt. William 

 are much indurated, and are succeeded by diabase or green- 

 stone. He says : " There can be but little dnubt that the 

 Ordovician is older than the diabase, and has been silicified by 

 its intrusion." 



24. Summers, H. S. " On the Cherts and Diabases of Ta- 

 tong." Read at Roy. Soc. Victoria, April, 1908, and published 

 in this volume. Mr. Summers discussed the relations of the 

 cherts and diabases in this area, which had been previously parti- 

 ally described by Mr. A. M. Hov^-itt, of the Geological Survey of 

 Victoria. He showed that the cherts were in places clearly in- 

 terbedded Avith unaltered sediments mapped by Mr. Howitt as 

 Ordovician on lithological grounds. 



25. Thiele, E. 0. Read at Roy. Soc. Victoria, May, 1908, and 

 published in thisvolume. Mr. Thiele in a previous paper (Vic. Nat., 

 vol. xxii., 1905, p. 24) had recorded the finding of IT. Ordovician 

 graptolites in black shales closely associated with the Serpentine 

 area, near Mt. Wellington. In this paper he discusses fully the 

 relations oi the Serpentine to the sedimentary rocks of the dis- 

 trict, and demonstrates that some of the black cherts which occur . 

 near the Serpentine contain recognisiable U. Ordovician grap- 

 tolites. The silicification of the shales Is thus sho\m to be of 

 post U. Ordovician age. 



.3. — Discu.'^sioN OK Prkviols Literati re. 



The i'nregoinii' list of papers shows that the literature on the 

 Heathcote and apparently related districts is a lenj^thy one. My 



