66 PERSONAL NARRATIVE. 



fringe of green bushes along the banks of the stream. 

 The hills on each side of the valley ascend in a series of 

 small limestone scarps. 



Leaving Agula next morning, March 26th, the road 

 led over long ascents and descents through an undulating 

 country almost entirely composed of limestone. The 

 rock is in comparatively thin beds, much resembling 

 lias, but lighter in colour. The high dip seen near 

 Dongolo disappears immediately beyond, and the rock is 

 horizontal or undulating, without any steady dip in any 

 direction. The country is covered with thin jungle of 

 mimosa bush. I had no better success than the day 

 before in fossil-hunting, but I had not much time to 

 search ; there was a long march of sixteen miles from 

 Agula to the next camping-ground, Dolo. 



The limestone evidently extends for a long distance 

 east and west of the road. Some hills about eight or 

 ten miles east of Agula may perhaps be of sandstone, 

 but the crags of the Geralta range run almost due west 

 from Dongolo, and the ground seen to the westward from 

 Agula must consist almost entirely of limestone, into 

 which the various streams traversed by the route of the 

 expedition at Dongolo, Agula, Dolo, &c., cut deep gorges 

 before uniting to form the Geba river, a great affluent 

 of the Takkazzy^. This stream doubtless exposes a most 

 interesting section of the rocks in this country. 



About eight miles from Agula the road dips into a 

 small valley, where is a halting-place, called Mai Mak- 

 dam. At this spot an important pass from the Salt 

 Plain to the eastward joins the route we followed, and we 



