77 
Museum Bulletin No. 25. 
[Plate XI. 
A. 
Plaster cast 
current, 
showing detail of asymmetrical ripple-mark made by river 
bed of St. Lawrence river, at Lanoraie, Que. (Page 12.) 
B. Plaster cast showing asymmetrical ripple-mark formed by river current, 
bed of St. Lawrence river at Lanoraie, Que. (Page 12.) 
