228 Reviews — R. Brongh SmytJis Map of Victoria. 



the Official Catalogue of the Yictorian Court in the London Exhibi- 

 tion of the present year. The map furnishes us with the latest 

 information and opinions held by the authorities of the Victorian 

 Mining Department on Victorian Geology. The geological features 

 are chiefly taken from Mr. Selwyn's Sketch Map, published by the 

 late Geological Survey of Victoria, with additions by Mr. Brough 

 Smyth and certain of the Mining Surveyors under his direction. 

 Tlie basis of the topographical portion of Mr. Smyth's New Geo- 

 logical Sketch Map was a compilation made at the Office of Mines 

 in 1866, from recent surveys, and in this respect has a considerable 

 advantage over Mr. Selwyn's earlier one. 



In certain essential points the present map differs from that of Mr. 

 Selwyn. Should these additions eventually prove to be correct, the 

 value of the map will be considerably increased, as they refer to rock 

 masses generally yielding economic minerals of considerable value. 



In the large eastern province of the Colony, Gippsland, much 

 alteration has been made in the relative boundaries of the Crystalline 

 rocks and the Upper and Lower Silurians. This, as this wild and 

 hilly portion of the country becomes opened up and better known, 

 is nothing more than might have been expected. A more clear 

 and well defined line has also been drawn between the Upper and 

 Lower Silurian deposits in the central portions of the Colony. 



The remaining rocks of Palaeozoic age were formerly delineated 

 on Mr. Selwyn's Map by one colour, and called in a general waj'' 

 " Upper Palaeozoic." The upper portion of this series at certain 

 localities contains the remains of Lepidodendra (Mount Tambo, 

 Mansfield, Avon River, etc.), and it was thought extremely probable 

 that these might represent some portion of the European Carbon- 

 iferous Series. Certain small patches of fossiliferous limestone in 

 Eastern Gippsland (Buchan, Bindi, etc.), regarding the identity of 

 which some doubts were entertained, are now mapped by Mr. 

 Smyth as Devonian, apparently on the strength of certain fossils, 

 some of which were pronounced by Professor McCoy to be identical 

 with species from the Devonian of the Eifel. Those mentioned by 

 Mr. Smyth in the explanation of the Sketch Map are Spirifera IcBvi- 

 costata, the remains of Placodermatous Fish, and Corals. The 

 upper portion of the series before mentioned as containing Lepido- 

 dendra are now definitely coloured as Carboniferous. 



The boundaries of the Carbonaceous Secondary beds, in places 

 coal-bearing, occupying some portion of the southern sea-board, have 

 not undergone any very considerable change since they were first 

 laid down by Mr. Selwyn. 



A series of beds on the east side of Port Philip Bay, much 

 resembling in their lithological aspect our Lower Tertiaries, and 

 formerly provisionally called Eocene, are on this Map termed 

 ' Oligocene.' They are well seen at Mounts Eliza and Martha, and 

 at Schnapper Point, where the following fossils appear very clia- 

 racteristic : — Valuta anticingulata, McCoy; V. antiscaUaris, McCoy; 

 V. Hannafordi, M'Coy ; V. strophodon, McCoy ; Cyprma gastroplax, 

 McCoy; Trivia avallanoides, McCoy; T. australis, McCoy, and many 

 others. 



