THE SMALLER GAZELLES 
the horns are somewhat shorter, and at the same time slighter, less 
curved, and less deeply annulated. 
Pelzeln’s gazelle ( gazella pelzelni ), which is an inhabitant of the maritime 
plains of Northern Somaliland, and is common near Berber a, is a slightly 
larger species than Speke’s gazelle, and lacks both the curious swelling 
and the black spot always present on the nose of the last-named species. 
The horns in Pelzeln’s gazelle are similar to but somewhat straighter 
than in Speke’s gazelle, the average length being ten or eleven inches in 
the males and six or seven in the females. 
Loder’s gazelle {gazella leptoceros) is an inhabitant of the sand dune 
country in the interior of Algeria and Tunisia. In colour it is of a very pale 
fawn, the well-known gazelle markings showing but very indistinctly. It 
is a considerably larger animal than the Dorcas gazelle, the bucks standing 
over twenty -six inches at the shoulder. The horns are long and slender in 
both sexes, with very little curve in them. The record length for the horns 
of a male is fifteen and seven-eighths inches. 
Although this species has been known to science since 1842, at which 
time specimens were living in the Zoological Park of the Jardin des 
Plantes in Paris, it seems to have been entirely lost sight of for many 
years subsequently to that date, until in 1894 an English sportsman, Sir 
Edmund Loder, rediscovered it in the sand desert some forty miles to 
the south of Biskra, in Algeria. 
The Isabelline gazelle {gazella Isabella) is a pale-coloured species 
inhabiting the Red Sea littoral in the neighbourhood of Suakim and 
Massowa. Its horns are said to be more curved than in any other small 
species of African gazelle, the tips turning sharply inwards. In this 
respect, however, there is much individual variation, and I found that 
amongst sportsmen in Khartum the opinion was that the Isabelline 
gazelle was only a local form of the Dorcas, and that the two species 
merged by imperceptible differences the one into the other. Certainly, in 
travelling by rail from Port Sudan, near Suakim, on the Red Sea, to 
Khartum, one sees gazelles of apparently one species all along the line 
from the sea coast to the Nile, and if the Isabelline and the Dorcas gazelle 
are really specifically distinct, it would be interesting to know at what 
precise point on the railway line the range of the former ceases and that of 
the latter commences. 
Heuglin’s gazelle {gazella tilonura) is an inhabitant of the upland plains 
of Bogosland, Abyssinia and Sennar. In this species the horns are very 
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