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Show 1891] ANTELOPES FROM SOMALI-LAND. 209 characters of its markings it agrees fairly with both, but in general form with the latter only, that animal, like it, being peculiar for its extraordinarily long neck ; and, finally, in the curvature of its horns it differs absolutely from both, as also from any of the other Gazelline genera, while it agrees with a group so different from it in all essential respects that the resemblance must evidently be an accidental one and not indicative of any relationship. Presumably the whole of the horn of this species is homologous with the terminal three or four inches of the Gerenook's horns ; that is to say, with the upwardly curved part, the greater part of the horn having become obsolete while the upwardly curved tips have attained to a remarkable proportionate development. The following are the dimensions of the skull of specimen c :- Length, occiput to gnathion, 210 millim., tip of nasals to occiput 176, greatest breadth 95; height, crown to angle of lower jaw 94 ; nasals, length 67, breadth 26; interparietal, length 24, breadth 39 ; height of orbital opening 35, gnathion to front of anterior premolar 63 ; length of molar series 53. Lower jaw, condyle to front of symphysis 153 ; height from coronoid process to angle 70 ; height of ramus at centre of m 5 15'4, at posterior end of symphysis 9. In a letter addressed by M r . Clarke to Mr. Rowland Ward, the following notes on the appearance and habits of this species are given: " The Somali name for these i\.ntelopes is ' Debo Tag.' I shot them in the new country I went into, and did not see them in any other part. They have a very long thin tail, and, when they run, throw it up and over towards the neck. The neck is very long and thrown back towards the tail, so that the two look as if they would touch each other." Shortly after the arrival of M r . Clarke's specimens, Mr. Sclater received from Mr. Swayne two scalps of this species which he had bought in Berbera, and these scalps Mr. Sclater has most kindly handed over to m e for the purposes of the present paper. Fortunately the muzzle of one of them has been preserved, so that I have been able to make out its strictly Gazelline character, and the description of the colours above given has also been taken from these specimens. It is much to be hoped that more specimens of this beautiful Gazelle will soon be obtained, and that we may thereby gain a full knowledge of its range, habits, and natural affinities*. 1 P.S. (May 14th).-Mr. Clarke has favoured me with the following notes on this new G-azelle:-• " I saw this Gazelle for the first time on December 17th, 1890, about three hours from ' Bairwell,' or about one day from ' Buroa Well, Habergerhagi's country,' and afterwards on the road all the way into the Marchan district, 8° N. 47° E. I killed a male, and found one of the horns broken off close to the skull, which had apparently been done a year or so ago. "They are very graceful animals, with a long neck and well-proportioned head and horns; the body is rather slender, but considerably larger than in Gazella spekii, about the size of a female G. walleri. The legs are long and slender; the hoofs are not so triangular as those of G. spekii, and small for the size of the animal. PROC. ZOOL. Soc-1891, No. XIV. 14 |