PLATE IX. 



Fig. I. Nephelite Syenite. Ordinary Light. X 33. The larger 

 grain of magnetite is surrounded by clear, crystalline 

 nephelite, and by augite. Kaolinized orthoclase ap- 

 pears in the upper part of the figure. 



Fig. 2. Syenitic Dike Rock. Ordinary Light, x 33. The dark 

 mineral is green fibrous hornblende. The colorless 

 portions in the figure are orthoclase. 



( 300 ) 



