Bui. 86, Bureau of Plant Industry, U. S. Dept. of Agriculture. 



Plate II. 



Fig. 1.— High Sand Dunes East of El Oued. 



Fig. 2.— a Typical Dwelling House of the Oued Souf, Showing its Cubical 

 Form and Roof Composed of Flattened Cupolas. 



Fig. 3.— General View of the Oued Souf Region, Showing Sunken Date 



Gardens and Sand Dunes. 



