1891.1 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 essen- 

 tial 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 pro- 

 portionate development. 



The following are the dimensions of the skull of specimen c : — 



Length, occiput to gnathion, 210 raillim., tip of nasals to occiput 

 1 76, 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 1 53 ; height from coronoid process to angle 70 ; height 

 of ramus at centre of ra^ 15*4, at posterior end of symphysis 9. 



In a letter addressed by Mr. Clarke to Mr. Rowland Ward, the 

 following notes on the appearance and habits of this species are given: 

 " The Somali name for these Antelopes 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 Mr. 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 me for the purposes of the present paper. Fortu- 

 nately the muzzle of one of them has been preserved, so that I have 

 been able to make out its strictly Gazelline character, and the de- 

 scription 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 Gazelle : — 



" I saw this Gazelle for the first time on December 17th, 1890, about, three 

 hours from ' Bairwell,' or about one clay from ' Buroa Well, Ilabergerhagi'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. See— 1891, No. XIV. 14 



