Fig. 6. — A garnet- sjjinel xenolitli enclosed in ilie gneisses 

 ofSleaforcl. X 27. 



Fig. 7. — ^enocrysts of spinel, sillimanite, and garnet 

 in the Flinders gneisses. X 30. 



[sp = spmel; g = garnet; si=sillimanite ; bi=biotite; pl=:plag-ioclase.] 



