SOMIi .MAMJIAl.S IX THE SOUTIIERX SUDAN. 347 



tlie two stallions shot, both over 6 years olil, one had strongly 

 marked shadow-stripes, while in the other any traces of such 

 marks were entirely lacking. The newly-born foal had indica- 

 tions of shadow-stripes on the quarters. 



All members of both herds without exception had white ears. 



The extreme northern range of the Zebra in Bor District east 

 of Bahr-el-Gebel is at 7° 30', ami the small troops occasionally 

 seen so far north in the height of the dry season may be regarded 



Reedbuck {Redunca). 



The type of Reedbuck, formerly very common in the neigh- 

 bourhood of Mongalla., was distinguished by the peculiarly wide 

 spread of the horns. The rinderpest epidemic in 1912 almost 

 exterminated these animals. Neveitheless, the peculiai-ity of the 

 branching does not seem to have been confined to Mongalla, nor 

 does it seem to be typical of any variety so much as of individual 

 specialisation. I have seen several male Reedbucks as far north 

 as Duk Fadiat, which is nearly 3 degrees of latitude north of 

 Mongalla, possessing these same wide-spread horns, but far the 

 larger number of the males in the locality have the ordinary type 

 of horns well hooked forward at the tips, wdiich one associates with 

 Behar Reedbuck. 



These Reedbuck are not only much smaller in size than, but 

 differ considerably in their habits from, the common Reedbuck of 

 the south. They are usually found grazing in parties with or 

 near herds of other game in the open, which is foi'eign to the 

 custom of Eleotraijus arandiiiuin. Tliey also run with their necks 

 outstretched, unlike the latter, which a,lways carries the head 

 high. 



Gazelle {Gazella). 



The local Gazelle in Mongalla Province though smaller have 

 the same general appearance and display the same habits as the 

 Thomson Gazelle of East Africa. 



The females bear weak malformed, decadent horns, and both 

 sexes continually wag their black tails in the familiar manner of 

 the " Tommy.' The herds and single I'ams act when apjH'oached 

 jusb as do tlie herds of the latter, and they scatter about when 

 grazing among the crowds of Thiang, which here take the place 

 of Kongoni Hartebeost, 



The external markings do not vary more from those of thomsoni 

 than one would expect from a local variety, while the bufFy band 

 which is spoken of by Roosevelt as existing between the black 

 side-stripe and the white underpart is, I think, purely an indi- 

 vidual eccentricity, and far from being universally present. 



Towai'ds the middle of very dry seasons these Gazelle migrate 

 northwards and spread along what is known as the Duk country — 

 where there is always sweet grass and watei' — as far as lat. 7^ 30' 



