North American Fauna No. 27, U. S. Dept Agr. Biological Survey. 



Plate VII. 



Fig. 1 .—Slave River Near Smith Landing, Showing General Character of 



Foresting. 



Fig. 2.— Alluvial Bank Being Worn Away by the Current, Lower Slave River. 



Fig. 3.— Characteristic Foresting on Island in Lower Slave River, Showing 

 Thkee Zones of Growth. 



