THE VICTORIAN NATURALIST— Vol. XXVI 1. 



Plate ix. 

 Fig. 1. 



September, 19 10. 



Ordinary light. X 30 diam. 

 OLDER BASALT, FROM NEAR SAND PITS. 



Fig. 2. 



polarised light. X -5 diam. 



NEWER BASALT, FROM OUTLIER EAST OF SAND PITS. 

 Photo-micros, by H. J. Grayson. 



