CANNON 



PLATE 29 





Fig. 66. Characteristic vegetation on the north slope of the Djebel Bou Rhezal, Biskra. 

 Haloxylon scoparium is a prominent species. 



4 



Fig. 67. North base of Ed Delouatl hills, west of Biskra, showing the low-facing dunes. 

 To the right is a glimpse of an oued which pierces the hills in the middle distance. 



