Vol. XXXIII., Plate XV. 



Fig. 1. Melaphyre. xl7. Fig. 2. Olivine-Diabase. x21. 



Fig. 3. — Granophyric Gabbro- 

 Diabase. xl5. 



Fig. 4. Gneiss. x22. 



Blinman Rocks. 



Hussey & Gillingham, Printers, Adelaide. 



