6 MR. E. T. BENNETT ON THE M’HORR ANTELOPE. 
Tn 
Length of the horn in a straight line . 74 
Distance between the tips ofthe horns 70... sO 
Circumference of the horn at its base. ~. . ...-.. «-- « « « « OF 
The survivor, being the older animal, is some inches taller, and its other measure- 
ments greater in proportion ; but these cannot be obtained with accuracy during life'. 
Both individuals are males ; but the female, as appears by a note of Mr. Willshire’s, is 
equally furnished with horns. 
The distinction between the three animals, the Nanguer of Buffon, the Addra of 
M. Lichtenstein and of M. Riippell, and the M’horr of the Society’s Gardens, is to be 
found chiefly in the distribution of their colours. The horns of the Nanguer, as figured 
by Buffon, appear intermediate in form between those of the young Addra and the 
M’horr, having no more than six rings, rising almost in a straight direction from the 
head to the point of curvature forwards, and measuring only six or seven inches in 
length. But the supposition that this is an intermediate state of the same animal, is 
contradicted by the colouring, the dorsal fawn in the Nanguer extending along the back 
and sides nearly as far backwards and downwards as in the M’horr, while in the young, 
as well as in the adult Addra, it gradually becomes narrower and fainter as it passes 
backwards from the lower part of the neck, leaving not merely the haunches and the 
crupper, but also the far greater part of the sides, white. This is equally the case in 
the young male with the horns scarcely protruded beyond the commencement of the 
rings, and in the adult with eighteen or nineteen rings to the horn; and is still more 
decided in the female, where the deeper colour is even more circumscribed in extent. 
In the specimens represented in M. Riippell’s work, there is also figured and described 
a short longitudinal fawn-coloured streak on the haunches, which is not met with in 
M. Lichtenstein’s figures, and is equally wanting both in the Nanguer and in the 
M’horr. In the former of these the haunches are wholly unmarked, the dorsal colour 
being cut off posteriorly in nearly a straight line, extending from the back downwards ; 
while in the latter, as we have seen, they are nearly covered by a broad somewhat tri- 
angular patch continued from the sides, extending down the hinder legs, and bounded 
above by a white streak, which is continuous with the white of the crupper. 
How far local circumstances may operate in producing more or less permanent, and 
more or less extensive, variations of colour, I will not attempt to decide: but the perfect 
coincidence in markings of the young and adult Addra, male and female, as figured in 
' This animal having since died, I am enabled to add its measurements, as follows :—Length, as above, 5 feet 
1 inch; from the tip of the nose to the inner canthus of the eye, 64 inches; from the tip of the nose to the base 
of the horn, 74 inches; of the tail (exclusive of the hair), 8 inches. Height to the tip of the horn, 4 feet 54 
inches; at the shoulder, 2 feet 11 inches; at the loins, 3 feet 1 inch. The length of the horn along its curva- 
ture anteriorly is 12 inches; and taken in a straight line from base to tip, 9} inches; the distance between the 
tips of the horns, 4 inches; and the circumference of the horn at its base, 63 inches. 
