no 
Journal of the 
EXPLANATION OF PLATES. 
PLATE VI. 
The illustrations wore drawn under tlio microscope, by means of the 
camera lucida. In every instance polarised light was used. 
1. Portion of the ground-mass of the dyke at Granite Creek, magnified by 
about 200 linear, showing hornblende microliths. 
2. Portion of the same dyke, showing flow structure of the microliths in 
the ground-mass—magnesia mica. 
3. Portion of the same dyke, showing crystal of orthoclase. 
4. Portion of dyke at Granite Creek, showing hornblende and triclinic 
felspars. 
5 and 6. Triclinic felspars from the dyke at Bulgoback, showing apatite 
needles marking lines of growth of crystal, and also the chloritic 
alterations. 
7. Hornblende from dyke at Bulgoback. 
8 and 9. Hornblende, with nucleus of ground-mass, from dyke at Bulgo¬ 
back. 
PLATE VH/ 
1 . 
2 . 
3. 
4. 
5. 
Young larva of Lerp insect. 
“House” of do. (seen from above.) 
Do. in section. 
Do. in process of enlargement. 
Sectional view of a full-sized “ house.” 
