14 Proceedings of the Royal Society of Victoria. 



The Mitchell River after flowing in a southerly direction 

 through rugged and hilly country consisting of devonian sand- 

 stones, shales, and conglomerates turns sharply to the east when 

 it enters the tertiaries and continues in this course until it 

 discharges into Lake King. The watershed on the southern side 

 is comparatively narrow. Moitun Creek, after flowing through 

 devonian rocks, enters the Mitchell as it passes into the tertiaries, 

 and the only other creeks discharging into it on this side are 

 Lucas Creek, which joins it near Perry's Blufl", and Cobbler's 

 Creek, which, after passing through McLeod's morass, junctions 

 with the river near Eagle Point. The watershed line consists of 

 a high sandy ridge which starts from the devonian hills, three 

 or four miles to the south of Moitun Creek and continues in a 

 direction approximately parallel to the course of the river. The 

 height of the ridge is about 400 feet above sea level at its 

 western extremity, and at its termination, at Eagle Point, about 

 85 feet. The latter is a conspicuous feature of the right bank of 

 the Mitchell below Bairnsdale, which arrests the attention of 

 passengers on the Lakes' Entrance steamers. The section from 

 its summit to the river level, as illustrated in Fig. 2, contains the 

 following strata : — 



Gravel, with stones up to Sin. in diameter 

 Yellow sand ------ 



Coarse cemented sand - - - - 



Fine cemented sand and gravel in layers 



Total 80 feet. 



The highest ridges consist almost entirely of sand, while, at a 

 lower elevation of from 150 to 200 feet above sea level, this is 

 mostly replaced by a clayey soil, which, in general, is full of small 

 circular depressions a few feet in diameter, locally termed crab 

 holes. In very wet weather these form almost continuous sheets 

 of water, but in summer they open into cracks which extend 

 downwards for a considerable depth, allowing the water to 

 escape. 



At an elevation of about 100 feet above sea level, a lower 

 terrace runs parallel to the river, on which is a soil of the same 

 character as that higher up. Near the limestone banks, especially 



