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D. T. MacDOUGAL 



After having made some acquaintance with the slopes, attention 

 was next turned to their upper margins and the foot-hills between 

 which the streams come down; and it was found at once that now, 

 instead of being among the species usually given as Egyptian and 

 listed in Muschler's Flora (Flora of Egypt, 2 vols. Friedlander und 

 Sohn, Berlin, 1912), most of the highland floral elements were of 

 Somaliland and of Abyssinia. The actual field work was done by 

 disembarking from the train at Sal Lom and going up the slope 

 to a hill, a few miles away; and in this brief excursion, an unknown 

 Geigeria was secured, while the much grazed, thorny tree Cadaba 

 was encountered. The slopes of the hill at Sal Lom bore a number 

 of small, densely branched, leafless trees with a greenish bark. 

 Euphorbia cuneata, which resembled greatly its Mexican relatives, 

 the torote or Bursera. (Fig. 3). The entire group of plants bore 

 the external features of slopes running down to the Gulf of Cali- 

 fornia, and some of the same genera were represented; but it was 

 noted that, although the rainfall was periodic and limited, the 

 number of species which bore accumulations of large balances of 

 water was small, and, in most of these, the surplus was under- 

 ground rather than in members of the shoot, or in leaves. 



After leaving the coast at Port Sudan, no accommodations were 

 to be secured ; and, as the time allowed for this section of our Afri- 

 can work did not pennit us to undertake the tedious and long 

 drawn-out task of organizing a camel train, a small saloon car, with 

 its interior divided into a work room and sleeping quarters for three, 

 was chartered for the trip across the summit to the Nile, and ar- 

 rangements were made with the superintendent to set the car out 

 on sidings in the desert at places in which the walking radius would 

 reach characteristic features of the region. 



The first stop was made at Kamobsana alongside a great khor 

 (K. Adit) at an elevation of 1500 feet. (Fig. 4.) It was possible to 

 climb Gebel Harrim, a minor peak nearby, to an elevation of 2700 

 feet and to explore the bed of the khor itself. During the course 

 of a strenuous day here, it was possible to secure reputable speci- 

 mens of ninety species of seed plants, ferns and liverworts, with 

 which to key our observations. This richness of species speaks of 

 a highly localized flora, represented by a few individuals of each 



