162 Mr. 0. Thomas on a 



In summer pelage. General colour singularly like that of 

 a dark-coloured pole-cat (Putorius putorius), much darker 

 than in the typical form. All the parts that are brown in 

 typicus are black in tsuensis, while the whole of the limbs, 

 and not only their distal portions, are black. Below, the lips 

 and interramia are black, the light mottling of the throat is 

 less in extent but much brighter in colour, orange-yellow or 

 orange, and the belly is much darker brown. Some of these 

 differences may be due to the faded state of the only summer 

 typicus available, and therefore less stress is to be laid on 

 them than on those in the winter pelage. On this account 

 the type selected is a winter example. 



Approximate dimensions of the type, from a skin (<$) : 



Head and body 470 millim. ; tail 160 ; hind foot 85. 



Skull: basal length 78; greatest length 88; greatest 

 breadth 54; interorbital breadth 23; palate length from 

 gnathion 41 ; palate breadth betAveen outer corners of ?ii 30. 



flab. Tsu-shima Islands. 



Type : B.M. 91. 10. 14. 3, collected at Kamoze, April 17, 

 1891, by Mr. P. A. Hoist. 



XIX. On a new Gazelle from Central Arabia. 

 By OLDFIELD THOMAS. 



SUEGEON LlEUT.-COLONEL A. S. G. JAYAKAE, of Muscat, to 



whom our knowledge of the fauna of South-eastern Arabia is 

 largely due, has recently sent to the British Museum a further 

 consignment of mammals, collected within the last two years. 

 Besides the Oman specimens, all of which belong to species 

 recorded in my paper on the mammals of that district*, there 

 are several skins of a Gazelle received by Dr. Jayakar from 

 Nejd, in the interior of Arabia, and these prove to represent 

 a most distinct form from any previously known. 

 It may be called 



Gazella marica, sp. n. 



Size about as in G. dorcas. Colour of head very much as 

 in G. hptoceros and Loderi that is to say, with the usual 

 gazelline face- markings almost obsolete. The central and 

 lateral dark bands of the face are of about the general body- 

 colour, and very slightly defined from the paler bands between 

 them. In the middle line the central dark band, such as it 



* P. Z. S. 1894, p. 448. 



