264 Proceedings of tlce Royal Society of Victoria. 



Small brown resinous grains in a sand consisting of quartz, 

 wolframite, magnetite, menaccanite, chrysolite (?), felspar 

 and gold, South Gippsland (W.). 



Phosphate of Cerium. — Probably monazite. Pinch Swamp 

 Creek, E. Gippsland (CI.). 



Nhill, and in gem sands generally (R.). 



This phosphate of ceriun), which is common in parts of 

 Gippsland, if not monazite is a closely allied mineral, 

 but it has never been completely analysed, perhaps 

 owing to the difficulty of isolating it. 



MULLERITE. 



A very doubtful mineral species (R.). 

 Nepheline. — See note under apatite. 

 Obsidian. — 



This and other glassy forms of rocks should not be included 

 in mineral catalogues. 

 Oligoclase.— A soda-lime felspar. 



Analyses of oligoclase from the basalt, Anakies (M.Dt.). 

 (See Report Aust. Assoc, for Advancement of Science, 

 vol. vii., p. 375). 



Silica - - - - 

 Alumina 



Ferric oxide - - - 



Lime - - - - 



Magnesia . . . 



Soda - - - - 



Potash - - - - 

 Unestimated and loss 



Opal. — Silica with some water. 



va?: Semiopal. — Massive, Beechworth; with felspathic clay 



in basalt. Deep Creek (B.M.). 

 var. Hyalite. — Botryoidal crust in vesicular lava, McDonald's 



Hill, Smeaton (B.M.). 

 var. Infusorial earth. — Grey and argillaceous; contains plant 



remains. Sewerage tunnel near Railway Street, South 



Yarra* (F. Spry). 



