nights. The other three lakes were visited all on one day and received only a cursory 

 examination. 



General Description of Ain- ez - Zauia, The lake, reputed to be the most produc- 

 tive in the area, lay 20 miles S.W. of El Agheila in a long narrow salt plain. There 

 were two pools of unequal size connected by a swiftly flowing stream (Fig. 1). The 

 lake was supplied by a warm spring rising in the smaller section, for water of tempera- 

 ture 30- 52?C (shade temperature 16°C) flowed out of it in two streams, one into a mass 



100 yards 

 (approx) 



(—»—♦= direction of water -flow ) 



Figure 1. 

 Sketch map of Ain- ez* Zauia 



113 



