1864.] DR. J, KIRK ON THE MAMMALS OF ZAMBESIA. 657 
Two specimens killed above Lupata. Once started, the members 
of this group of Antelopes have the habit of never stopping until 
out of sight. 
53. NESOTRAGUS LIVINGSTONIANUS, 0. Sp. 
Shupanga and Lupata, where it is named “Rumsa” or ‘ Lumdsa.”’ 
This small Antelope is very nearly allied to N. moschatus of the 
island of Zanzibar, under which name it is probably mentioned in 
Dr. Peters’s ‘Mammalia.’ Yet it seems to me different from that 
of Zanzibar, of which I have seen three recently killed specimens in 
that island. The size of the two animals is nearly the same; the 
colour of that on the Zambesi lighter, and the hair softer, the ears 
larger aud broader, horns more closely ringed, and nostrils more 
narrowed. 
The habits of this Antelope resemble those of the Zanzibar ani- 
mal; it frequents dense underwood jungle; lives in pairs. On being 
started, it runs quickly, not unlike a hare, turning quickly, and con- 
cealing itself in some tuft of grass or small bush. 
It seems to me that between the specimen in the British Museum 
from Zanzibar and the head from the Zambesi there are specific dif- 
ferences, sufficient to justify the latter being at present regarded as 
a distinct species. Better specimens of both are much needed. 
54. OREOTRAGUS SALTATOR. 
The “ Klippspringer ”’ of Cape colonists. 
Found singly or in pairs in rocky ground and among mountains ; 
seen in Kebrabassa, and on the hills at the Murchison Rapids, River 
Shiré. Only two specimens were killed, both females. 
55. HELEOTRAGUS ARUNDINACEUS. 
Named “ N’Sengo”’ at Sena and Tete. Very widely distributed 
on open grass-plains, both at the coast and in the interior. 
Zambesi delta ; Shupanga; Sena; Batoka. 
Commonly found feeding in small herds; in the heat of the day 
it rests in long grass, and may be approached within fifty yards 
before starting. It seldom runs far without stopping to look round. 
Before again making off, it gives a shrill whistle, as it does often when 
first started. 
Should the female have young, unable to run far, and danger near, 
she places her foot on the shoulder and presses it to the “ground ; 
after which it never moves until almost trodden upon, and is expected 
to remain in the same spot until the return of the mother. 
The curvature and amount of divergence of the horns varies in 
this Antelope more than in some other species. 
56. HELEOTRAGUS VARDONII. 
Antilope vardonii, Livingstone, Missionary Travels. 
Native name, “ Poku.”’ 
This is one of the three water-antelopes common to the marshes 
Proc. Zoou. Soc.—1864, No. XLII. 
