1903. | MAMMALS FROM THE SOUDAN. 299 
This beautiful little species is readily characterised by its strong 
sandy colour, the marked dorsal darkening, and elongated palate. 
14, JACULUS GORDONI, sp. 2. 
85. 9. Gebel Agageh, W. Kordofan. 12 November, 1902. 
104. 105. oo. Kaga Hills, W. Kordofan. 20 November, 
1902. 
106, g¢. Gebel um Durragh, W. Kordofan. 25 November, 
1902. 
Allied to J. jaculus Linn., but larger and differently coloured, 
and with longer ears. 
Size rather greater and build stouter than in J. jaculus. 
General colour above, as compared to the yellowish “ buff” of 
J. jaculus, darker, and nearly approaching to “ vinaceous buff ” 
of Ridgway. Laterally, the dark colour seems to pass rather 
sooner into the pure white of the under surface. White markings 
more extended than in J. jaculus, the cheek, supraorbital, and 
postauricular white patches all large. White hip-stripe large, 
weakened in colour by a faint buffy or brownish sprinkling. Fore 
limbs wholly white. Hinder aspect of thighs like back. Fine hairs 
of feet silvery white, the terminal half of the long digital haus 
sandy. Tail of the usual pattern, its basal portion isabelline buffy 
above; black subterminal band rather over an inch in length; 
white tip 3-2 in.; longest hairs at end of tail 16-17 mm. in 
length. 
Skull shaped quite as in J. jaculus, but larger and heavier 
throughout. 
Dimensions of the type, measured in the flesh :— 
Head and body 120 mm. ; tail 200 ; hind foot (s.u.) 63; ear 25. 
Skull: greatest length in middle line 34; basilar length 2775; 
zygomatic breadth 24; tympanic breadth 2477; length of nasals 
on outer edge 12°5; interorbital breadth 12°8; interparietal 
5-7 x87; palate, length 17°3; palatal foramina 47; diastema 
9:6 ; length of upper molar series 5:1. 
Hab. (of type). Kaga Hills, W. Kordofan. Also oceurring at 
Omdurman. 
Type. Old male. B.M. No. 3.2.8.16. Oviginal number 104. 
This Jerboa, which I have named in memory of the famous 
General Gordon, differs decidedly from the ordinary Egyptian 
J. jaculus by its larger size and different colour. The Museum 
had previously received a specimen of it from Omdurman, 
collected by Mr. W. L. 8. Loat, but as that was young and without 
skull, it could not be described. 
The only other species which need be referred to is Dipus 
microtis Reichenow ' from “Samar, in Nord-ostafrica.” That was 
founded on a young specimen, but the description of its teeth 
shows that it was sufticiently adult not to be the young of the 
present form, than which it is very much smaller (‘ Lauflinge 
1 Zool. Anz, x. p. 369 (1887). 
