PLATE XV. 
Fic. 1. Fine-grained Norite. A phase of the olivine-gabbro at Dolin’s Lake. 
Biotite is represented by heavy parallel lines, plagioclase by light 
ones; augite and hypersthene by irregular cracks, the hypers- 
thene sometimes showing schillerization with innumerable mi- 
nute parallel rods of magnetite. Spec. 473. 77 diam. 
Fic. 2. Quartz-bearing diabase from west of the Goldnroute Marsh. The feld- 
spar is shaded with parallel lines, the augite by irregular ones, the 
magnetite being black and the quartz unshaded. The abundant 
apatite needles are too small to be shown in the figure. Spee. 
304. XX 20 diam. 
