71 
Museum Bulletin No. 25. 
Plate VIII. 
A. Asymmetrical ripple-mark with amplitude of 2 to 4 feet, at the mouth 
of a tidal stream, northwest corner St. Mary bay, N.S. (Page 19.) 
B. Asymmetrical ripple-mark or “sand waves,” with amplitude of 10 to 15 
feet, Avon river, Windsor, N.S. (Page 22.) 
m m i to 
