BY T. W. BDGEWORTH DAVID. 663 



■at least 800 feet lower, and that the glaciers and ice-fields had a 

 far greater extent than was at first supposed. 



The chief notes, then, in this paper modify or add to our 

 previous statements about the glacial evidences relating to the 

 Blue Lake, and to the U-shaped valleys, hanging valleys, and 

 iilled-in lake-basins outside and below the higher region of where 

 traces of glaciation are fresh and conspicuous. 



The Blue Lake. — With the help of a coracle made of an outer 

 skin of American cloth on a framework of gum-sticks and rabbit- 

 proof wire-netting, a series of soundings was obtained of this 

 lake, which proved its greatest depth to be about 75 feet. With 

 the help of Messrs. H. J., G. and E. Carter, C. A. Siissmilch and 

 H. S. Mort, a sketch-survey of this lake was plotted, and the 

 cross-section proves that the lake is a true rock-hollowed basin. 

 A photograph taken by Judge Docker exhibits a fine example of 

 a hanging valley on the north side of the lake. This hung about 

 200 feet above the lake-level. The dredgings made by 

 Mr. Hedley and myself have yielded the following freshwater 

 Annelids (Oligochce.ta) — Tubifex davidis Benham,* Branchiura 

 pleurotheca Benham, Phreodriloides notabilis Benham.* 



With reference now to the evidence of U-shaped valleys as 

 indicating glaciation, a very interesting section is afforded by 

 the Snowy River Valley, just below the junction with it of the 

 creek which forms an outlet to the Club Lake. The section is a 

 short distance below the spot known as the Pile of Stones, just 

 N.W. of Charlotte's Pass. There is an old filled-in lake just 

 above the spot where this cross-section was taken. For this 

 filled in old glacial lake the name of Lake Andrews is suggested. 

 If the observer looks down upon the small silt-plain, which at one 

 time formed the floor of this lake, he will see evidences, in the 

 U-shaped contour of the valley below, of the former existence of 

 the rocky bar which led to the impounding of the Snowy River 

 water, and so to the formation of the lake. The Snowy River 

 has gradually cut down a V-shaped notch through this bar to a 



* Benham, Rec. Austr. Mus., 1907, vi. pp.251-264, pis. 46-47. 



