81 
Museum Bulletin No. 25. 
Plate XIII. 
A, Irregular basin structure developed in sand by powerful tidal currents, 
Avon river, N.S., above Canadian Pacific Railway bridge. (Page 22.) 
B. Scalloped and terraced beds of sand developed by currents of ebbing 
tide in zone adjacent to "sand waves” (Plate VII B), Avon river 
N.S., above Canadian Pacific Railway bridge. (Page 22.) 
