THE GAZELLES AND THEIR ALLIES 601 
Key to the Races of thomsoni 
Snout without a darker patch near the tip; the dark stripe through 
the eye dark reddish, not blackish; dark pygal stripe 
narrow; horns parallel in direction with the tips close 
together thomsoni 
Snout marked by a large black patch near the tip; the diagonal 
stripe through the eye blackish; pygal stripe wide 
and distinctly blackish; horns wider-spread at the tips 
nasalis 
Kilimanjaro Thomson Gazelle 
Gazella thomsoni thomsoni 
Gazella thomsoni Gunther, 1884, Ann. fc? Mag. Nat. Hist., vol. XIV, p. 427, 
fig. of horns. 
Range. —From the Kilimanjaro region southward 
through the Rift Valley to Irangi in German East Africa. 
The Thomson gazelle bears the name of a noted explorer 
of British East Africa, Joseph Thomson. Thomson ar¬ 
rived at Mombasa in 1883 and journeyed inland by way of 
Kilimanjaro and the Masai highlands as far as Lake Baringo. 
During his travels he met frequently with this gazelle and 
brought back with him to England several pairs of the 
horns. No exact locality was attached to these spec¬ 
imens, nor was any mention made in his account of the 
journey in “ Through Masailand,” as to where the spec¬ 
imens were shot or regarding the occurrence of gazelles on 
his route. The horns were figured and described by Doctor 
Gunther as those of a new gazelle which he dedicated to 
Thomson, but no exact locality was given the specimens 
collected by him. In the absence of a definite locality 
the typical race has been assigned to the Kilimanjaro 
region, where Thomson spent considerable time in exploring 
the south, east, and north slopes of the great mountain. 
Willoughby, Hunter, and Abbott, a few years later, shot 
specimens on the plains flanking Kilimanjaro on the south¬ 
east. The first complete specimens of the gazelle received 
at the British Museum were sent by Jackson, and upon one 
of these was based the colored figure in the “ Book of 
Antelopes/’ 
