Ghraptolites in JSTorth-Eastern Victoria. 185 



this latter area he quotes, on the authority of Sir Frederick 

 McCoy, Diplograptits rectangularis, McCoy, from Deddick ; 

 Diplograptus foliaceus, Murch., and Didymograptus caduceus, 

 Salter from Guttaniurrh Creek.* From the Gibbo River he 

 quotes Palaopora sp., from the limestones and states that Sir 

 Frederick McCoy regards this form to be indicative of the Upper 

 Silurian age of the limestone. In a later paperf the same 

 author, in speaking of the slates and sandstones of the Upper 

 Dargo, says that they "have hitherto been provisionally regarded 

 as Lower Silurian, but may possibly be found ultimately to be 

 Cambrian." Although, from the nature of the case, Mr. Howitt 

 speaks guardedly of the age of the strata, he has shown that part, 

 at any rate, of the metamorphic schists are representatives of the 

 unaltered sediments, t 



The three localities which have yielded the graptolites treated 

 of in this paper are widely separated, but are, as far as can be 

 judged, of nearly the same age, and may be referred to the higher 

 part of the Ordovician. Till more evidence be available it would 

 be rash to push the analogy to the succession in British rocks any 

 further. , 



As far as I am aware there are no published records of any 

 (Upper) Silurian fossils, other than the Pakeopora referred to by 

 Mr. Howitt, having been found in the area under consideration. 

 Mr. Ferguson, however, informs me that he has a large suite of 

 fossils from Wombat Creek which he considers to be (Upper) 

 Silurian. The publication of his report will be looked for with 

 interest. 



It is of course possible that, in such a wide area as the one 

 treated of, rocks older than these may occur, but of their occur- 

 rence we have no evidence whatever. Mr. A. W. Howitt in his 

 long series of papers on the rocks of Eastern Victoria has shown 

 that a gradual passage takes place from the unaltered rocks into 

 the crystalline schists, and this fact taken in conjunction with 

 the evidence here brought forward as to the geological age of the 



* Progress Report, Geol. Survey of Victoria, vol. iii., p. ISO. 



t " Xotes on the Contact of the Metamorphic and Sedimentary Formations of the Upper 

 Dargo River." Department of Mines, Special Reports, 1892, p. 3. 



X A ust. Ass. for Adv. Science, vol. L, Sydney, p. 2C0. 



