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6+ inches, and are evenly curved upwards to their slender points. Figure 42 
shows those of an aged specimen, in which it will be seen that the sharp slender 
point has got more worn down, while at the same time a long straight basal 
portion has been added below. ‘This change causes such a difference in the 
general appearance of the horns that authors have in many cases been led to 
suppose that the extremes represent different species. We therefore take the 
opportunity of pointing out how deceptive such appearances are, and how 
careful writers should be when they found species mainly on the characters 
presented by the horns. At the same time, the perfect identity of the curves 
in the part that is common to both specimens is very noteworthy, and shows 
how valuable horn-characters may be when skill and care are exercised 
in using them. : 
Our figure of this Antelope (Plate XLV.) has been taken by the kind 
permission of Mr. W. L. Sclater from a specimen of this species belonging to 
the South-African Museum at Cape Town, which had been sent home to 
Mr. Edward Gerrard of Camden Town to be mounted. It is an adult male 
and was obtained by Dr. D. R. Kannemeyer near Burghersdorp in the Cape 
Colony on the 28th May, 1894. The specimen stands about 274 inches high 
at the shoulders, and the body from the nape to the rump measures about 
29 inches. The tail is very bushy, and measures at least 9 inches to the end 
of the hairs. ‘The bare spot beneath the ear is very observable. The general 
colour of the specimen is well shown in Mr. Smit’s figure. 
February, 1897. 
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