Bui. 54, U, S. Dept. of Agriculture. 



Plate II. 



Fig. 1.— Kamas Prairie, near Lakeview, Oreg. 

 [A typical filled lake. The outlet is through the gap visible in the opposite rim.] 



Fig. 2. 



-Small Inclosed Pan on the Lava Plateau North of the Christmas Lake 

 Valley, Oreg. 



