224 Proceeding.'^ of the Roijal Society of Victoria. 



its constituents in specimens taken from adjoining localities is in 

 accordance with observations made in other parts of Victoria. 

 The rock should be classed as a syenite. 



The specimens of Victorian granitic rocks examined in this 

 paper direct attention to the following points : — 



1. The relatively large occurrence in these rocks of plagio- 



clase felspar. 



2. The plagioclase felspar sometimes occurs in two genera- 



tions, has better crystal definition than the orthoclase, 

 and has almost always preceded orthoclase in the 

 order of crystallization. 



3. The persistent occurrence of apatite as an accessory 



mineral in both granites and granitites. 



4. The acid nature of granitic veins, and the frequent 



occurrence of basic secretions. 



