Proceedings Am. Philos. Soc. Vol. XLIX. No. 196 



Plate XXXV 



Fig. 3 



Fu; 



Fig. 3. Grains of spinel in a bastite matrix. (Magnified 35 diameters.) 

 Fig. 4. Picotite with opaque chromite. (Magnified 35 diameters.) 



Fig. 5. Serpentine with veins of chrysotile stained b\' iron oxide. From the 

 Oak Hill area, near San Jose. (Reduced A of diameter.) 



