EXPLANATION OF THE PLATES 
CONTINUED. 
* PLATE 17. 
Map of tlie river Voxa and the Lake Souvando, with the surrounding 
country. 
" PLATE 18. 
Fig. 1. Section across the river Voxa at the falls oflraatra. 
Fig. 2. Plan of the river Voxa, at the falls of Imatra; on the banks are the 
boulders described at page 341. 
* PLATE 19. 
Fig. 1. Basaltic dykes in the Isle of Mull, near Carsaig; described page 370. 
Fig. 2. Represents Stona Buach, or the promontory of the Goats, Isle of Mull. 
The upper part consists Of columnar basalt, which rests on irregular strata 
of limestone and green sandstone. See page 372. 
* PLATE 20 . 
Natural perforations in basaltic rocks in the Isle of Mull. The nearest is 
called Bidda vich Re Lochlin, or the promontory of the son of the King of 
Norway. It is pierced through a detached rock, and the arch is about 
70 feet high ; on the top of the rock is a row of apparently single basaltic 
columns, as if it were a columnar dyke. Two of these columns stand by 
themselves. The base of this rock is green sand in coarse grains. The 
farthest perforation is called Uam-will, or the pierced Cave. It is about 
60 feet high, and between 50 and 60 feet broad. The rock which it pierces 
is basalt, resting on green sand. Over the arch is a stratum of basaltic 
columns. See page 373. 
