CANNON 



PLATE 19 



' m' 



Fig. 43. Retama retam, in dunes about 58km. from GHardaia. 





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Fig. 44. Dates at the bordj Zolfana. about 58km. from Ghardaia. One of two wells encountered 



between Ghardaia and Ouargla. 



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Fig. 45. Ghardaia to Ouargla. View overlooking flood-plain of the Oued M'Zab, or a tributary 

 of this oued. The adjacent upland is apparently without plant life. 



