8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6l 



D 2 Horns not turned outward and widespread, the tips not hooked 

 backward. 

 E 1 Horns evenly spreading in an ellipse, the tips approaching 

 one another. 

 F 1 Dorsal color darker cinnamon, horns longer, .granti. 

 F 2 Dorsal color lighter cinnamon, horns smaller 



roosevelti. 

 E 2 Horns more nearly parallel, not curved outward. 



F 1 Dorsal color darker, dark flank band obsolete in the 



adult female lacuum. 



•F 2 Dorsal color lighter, dark flank band distinct in the 



adult female raineyi. 



C 2 No dark pygal stripe bordering the white rump patch brighti. 



Typical Gazella granti is found only in Central German East Africa 

 in Ug"ogo, where it was originally discoverel by Speke and Grant in 

 i860 during their journey of discovery of the source of the Nile. 

 This point marks the southern limit of its range in Africa. Here it 

 was found inhabiting a dry arid saline valley at some 3,000 feet eleva- 

 tion. From this point the species ranges northward through the 

 Rift Valley as far north as Lake Zwai in southern Abyssinia, where 

 the race Gazella granti lacuum occurs. Westward the species spreads 

 to the southern shores of the Victoria Nyanza and enters the Nile 

 watershed. In this southwestern corner it has evolved a widespread 

 horned form which has been named G. g. robertsi. At the north- 

 western corner another race appears, G. g. brighti, which is the palest 

 and the least banded of all. Near the coast at Kilimanjaro we find the 

 darkest race, G. g. scrcngctce, which is somewhat intermediate in 

 color with the still darker G. petersi. The latter species carries the 

 G. granti type still farther east and north to the mouth of the Tana 

 River. Peter's gazelle is, however, much smaller and darker than 

 an)' of the races of Gazella granti, and is not known to intergrade with 

 it. Occupying the central part of the range and also the most elevated 

 region we have Gazella granti roosevelti. Lying between this ele- 

 vated region on the southern edge of the Abyssinian desert we meet 

 with the shorter horned race known as G. g. raineyi. The horns reach 

 their maximum spread in the southern race, G. g. robertsi, but are 

 also widespread and large in the neighboring typical G. granti. As 

 we go northward the horns become more parallel and shorter until 

 the extreme is reached in narrowness and shortness in G. g. brighti, 

 inhabiting the country draining into Lake Rudolf from the west. 

 Gazella granti notata is apparently a highly colored local form occur- 

 ring only on the high plateau flanking the Lorogi Mountains on the 







