18T2.] SIR V. BROOKE ON A SUPPOSED NEW GAZELLE. 601 



8. On a supposed new Species of Gazelle from Eastern Africa. 

 By Sir Victok Brooke, Bart., F.Z.S. 



(Plate XLI.) 



During their celebrated expedition in search of the Nile sources, 

 Capts. Speke and Grant, in the November of I860, whilst passing 

 through Ugogo, obtained three specimens of a Gazelle entirely strange 

 to them. Meeting a down caravan at Kazeh, they dispatched these, 

 along with some other specimens of natural history, accompanied by 

 a letter to Dr. Sclater, intending them to be deposited in the rooms 

 of this Society until their return. The letter arrived safely, and is 

 published in the Society's 'Proceedings' for 1863, p. 1; but the box 

 containing the specimens was, as is too often the case, lost, probably 

 never having reached Zanzibar. In this letter Captain Speke sends a 

 rough outline of the head and horns of the Ugogo Gazelle, placing his 

 short notice of it, with evidently great doubt, under the name of 

 Antilope scemmeringii. To this notice, at page 4, Dr. Sclater appends a 

 footnote, expressing his conviction of the species being a new one, an 

 opinion in which Dr. Gray agreed. 



Again, in his « Journal,' at page 64, Captain Speke gives an excel- 

 lent woodcut of what he there calls the "new Antelope from Ugogo." 

 In the text he compares it in size to the common Indian Antelope, 

 in colour to the little Goa (Gazella picticauda) of Thibet, excepting 

 as regards the presence of dark markings on the face of the Ugogo 

 Antelope. 



I have long been of the opinion that this species is an exceedingly 

 distinct and undescribed one, and was therefore much pleased when, 

 upon mentioning the Antelope to Colonel Grant a short time ago, he 

 informed me that he and Captain Speke had at the time made very 

 careful sketches of their heads and skins, being greatly struck with 

 their novelty. An examination of these water-colour drawings has 

 confirmed me in my opinion. The species evidently belongs to the 

 section of large, long-limbed Gazelles of which Gazella dama, G. 

 mohr, G. euchore, and G. scemmerringii are the representatives. It, 

 however, differs very decidedly from any of these species both in the 

 details of its markings (the general ground-colour of the desert Ga- 

 zelles being much the same in many species), but especially in the 

 great length, massneness, and form of the horns. These ornamental 

 appendages, according to the dimensions given by Capt. Speke and 

 Col. Grant, attain an extraordinary development in the Ugogo species, 

 the horns of the male measuring 26 inches in length, those of the 

 female 15 inches. These dimensions are nearly double those attained 

 by any Gazelle with which I am acquainted. In direction the horns 

 of the Ugogo Gazelle depart widely from the lyrate form so typical 

 of this group ; they greatly resemble, on a very large scale, those of 

 the Gazella bennettii of India, being apparently much compressed 

 from side to side, rising with a gentle inclination forwards from their 

 base, then curving backwards at about half their length, and then 



