Quart. Journ. Geol. Soc. Vol. LXX, Pl. XLVI. 



lax is 



lb. x 18 



2.x 8 



3.x 18 



D. Leighton, Photomicro. 



Bemrose.Collo, Derby 



Quartz - Soda- Porphyrite, Magnetite - Act i no lite - Stauro lite- 

 Rock, and Basic Rock from the ORANGE FREE STATE. 



