87 
Museum Bulletin No. 25. Plate XVI. 
A. Plaster cast of miniature delta formed by ebbing tidal current and asso- 
ciated with ripple-mark, Kingsport, N.S. (Pages 36, 37.) 
B. Plaster cast of current mark, middle ground bar, mouth of Avon river, 
N.S. (Page 37.) 
