THE WAHA-AMBILLEE. 201 



univalve, exactly identical with some I had taken, 

 from a thin stratum of a cretaceous earth, lying 

 beneath the lava in the narrow strip of land, 

 between the sea at Goobat ul Khhrab and the 

 Salt Lake. I have the authority of Dr. Roth, the 

 naturalist attached to the British Political Mission, 

 that living specimens of this fresh water shell have 

 been found in this neighbourhood ; an interesting 

 fact, as it proves that the fossils I collected between 

 Goobat ul Khhrab and the Salt Lake, and those at 

 Gobard, are very recent, and that the river Hawash, 

 at some former period of the earth's history, entered 

 the sea in the Bay of Tajourah. 



Besides the Gobard and Hawash, no other river 

 enters the Abhibhad Lake, although the extensive 

 plain to the south, as far as the hills of Hurrah 

 that form the water-shed of the river Whabbee, 

 is drained by a stream, the waters of which flow 

 close to the western side of this lake, through 

 Killaloo to the Hawash. This is only during the 

 rains, when this part of Adal is, I should think, 

 one extensive morass, in which a chain of shallow 

 lakes, communicating at times with each other, in 

 a direction bearing to the north and east, forms a 

 river called Waha-ambillee, which Ohmed Medina 

 said terminated at Killaloo, but Ohmedu contended 

 that it proceeded into the Hawash, just before 

 that river entered its final lake, Abhibhad. 



The course of the river of Gobard from the east, 



