KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 48. N:O 5. 167 
definite opinion about certain specimens. For instance, a typical head of 4. qg. robertsi 
is very easy to recognize on its horns the tips of which point outwards and backward 
and thus have a great spread. Horns of G. g. robertsi about which there could be 
no mistake I saw brought from Sotik. On the other hand it is not uncommon that 
a dispute arises whether a certain pair of horns shall be regarded as G. g. granti, or 
G. g. robertsi, and I remember that I have been in uncertainty myself about this 
when once called to settle a controversy on such a matter. This proves that there 
are intermediate links between these races. 
The Grant Gazelle of the Athi plains near Nairobi, and in the southern Game- 
reserve belongs to the typical G&G. g. granti, while &G. g. petersi with more parallel 
horns, and the colour of the back reaching the root of the tail is found at lower 
Tana and Sabaki rivers, thus nearer the coast. 
G. g. notata is said to live in the country »from the highlands southwards and 
south-eastwards of Lake Rudolf to the Guaso Nyiro-valley and Mount Kenya> (LY- 
DEKKER l. c. p. 262). Judging from this I expected to find the race mentioned in 
the country round Guaso Nyiri. This was, however, not the case. The characteristic 
of G. g. notata, from which also the name is derived, is that it shall have the body- 
markings » much intensified»>. »Dark and light lateral bands much longer and broader, 
the former nearly black and reaching forwards on to the shoulder, and backwards - 
nearly to the white rump-mark; the latter pale buff, and succeeded above by a second 
dark band, lighter than the main lateral band, but distincetly darker than the centre 
of the back. This second dark band united with the other behind the posterior end 
of the light band. Pygal band black and very strongly defined» (SCLATER & THOMAS 
I. ce. p. 191). The Grant Gazelles on the acacia-steppe at Lekiundu river near but 
south of Guaso Nyiri had, however, no such appearance, nor their congeners in the 
thornbush on the northern side of the latter river. Instead of having intense markings 
they were very pale all over, and the markings obsolete. There are two such sub- 
species described viz G. g. brighti THOMAS, and G. g. lacuum NEUMANN. The former 
which LYDEKKER terms the Lado race is said to inhabit the country between Lake 
Rudolph and Lado. The latter the Abaya race is from the surroundings of Lake 
Abaya, or »vom Zuai-See bis zum Gandjule-See>. G. g. brighti? is fully described and 
characterized by its pale colour and absence of dark lateral bands in all specimens 
of any age. This race has also comparatively short horns and a »growth-boss» at 
their anterior bases retained into adult life. About &G. g. lacuum it is much more 
difficult to get any clear idea. It is said to be somewhat smaller than G. g. granti 
and provided with straight horns. The dark lateral band is said to be conspicuous 
in young animals, and present but indistinct in old females. The dark pygal band 
is said to be less developed than in &G. g. granti and the white rump-patch smaller. 
The horns shall be longer than in G. g. brighti. 
Considering all it appears most likely that my specimens are more nearly related 
to the race named G. g. lacuum than to any other but, although in the following I 
1 Proc. Zool. Soc., London 1900, p. 805. 
