208 PROCEEDINGS OF SECTION C. 



however, retain the ornament so perfectly that they are practically as 

 useful for purposes of identification or diagnosis as those fossils in 

 which the shell has been preserved ; the cast showing the form of the 

 organism, and the mould the external contour and ornament. 



Amongst the chief localities for Melbournian fossils are : — Moonee 

 Ponds Creek, South Yarra, the various sewerage excavations in the 

 city and suburbs of Melbourne, Studley Park, Templestowe (Koonung 

 Koonung Creek and the neighbouring road cuttings), Merri Creek 

 (near Donnybrook), Warrandyte, Broadhurst's Creek (near Kilmore), 

 Yan Yean, and Heathcote. 



That the sandstones and mudstones of the Melbournian merely 

 represent difierent lithological phases of about the same palseoutological 

 horizon may be inferred from the community of faunas between, say, 

 Moonee Ponds Creek (sandy) and South Yarra (argillaceous) ; whilst 

 in each of these localities the conditions are sometimes seen to have 

 interchanged in the space of a few feet of vertical thickness. 



So far, there has not been sufficient palaeontological evidence 

 obtained from the Melbournian series to enable us to divide the beds 

 into zones ; although certain fossils do undoubtedly occur in bands. 

 For example, Palaeoneilo (P. victorise and others) are found in a limited 

 area in the Yarra Improvement Works at South Yarra, and the 

 neighbourhood, occurring typically in a blue mudstone ; whilst the 

 Ohonetes melbournensis is found most abundantly in the area including 

 East Melbourne, Studley Park, Yan Yean, and Templestowe. By 

 careful and assiduous collecting along the principal lines of strike, we 

 may, no doubt, presently be furnished, with more complete data to 

 enable us to point to definite zones in these beds, which, I feel sure, will 

 eventually be proved to exist, as they have been in other Silurian areas. 



In Selwyn's horizontal section from the parish of Mickleham 

 (Merri Creek) to Mount Dandenong* the various folds of the Silurian 

 are clearly set forth along the line of section taken. Seven or eight 

 small anticlines and synclines are there shown, but in many cases the 

 exposures up to the present have proved unfossiliferous. The chief 

 anticlines which bring up the Melbournian fossiliferous strata to the 

 surface are those of the Merri Creek, near Kinlochewef ; the Whittlesea 

 anticline (embracing the Yan Yean and probably the South Yarra and 

 Studley Park Melbournian outcrops) ; as well as the Templestowe and 

 Warrandyte anticlines. Along the Lilydale railway line from Mel- 

 bourne, JutsonJ has indicated some minor anticlines, as the Blackburn 

 and Ringwood anticlines, between which is the Warrandyte anticlinal. 

 Jut8on,§ on the field evidence alone, places the grits and conglomerates 



* Selwyn ('56, 57), section. 



t Spelt " Kilnochue " in Selwyn's section. 



t Jutson ('H»), p. 525, PI. XCIir. 



I Jutson (H*), p. 531. 



