MAMMALS 287 
teeth and the much shorter and more rounded skull distinguish it from 
either of the above species. 
‘ Head and body (c.) 290 millimetres ; tail (c.) 245 ; hind-foot 52 ; skull : 
greatest length 57, breadth 31, brain-case 25’5, breadth outside teeth 
20*3, length of carnassial tooth (outer side) 5*5, breadth of first molar 
6*2, breadth of second molar 4*4, mandible length (bone only) to condyle 
37, to angle 37*1. The most marked differences in the skull compared 
with H. gracilis are its shortness, the less developed occipital and sagittal 
crests, the post-orbital processes not joining, the shorter tooth-row 
(measurement of entire tooth-row about equalling that from the front 
of the canine in H. gracilis), teeth individually smaller (especially the 
carnassial and first molar), last molar longer in proportion to the first, 
and the greater vertical depth of the auditory bullae ; in the mandible 
the most striking difference is the much shorter angular process, the 
measurements from the front of the jaw to the condyle and to the angle 
being practically equal.’ 
The White-tailed M ungoose {H. albicauda). 
Abyssinian boundaries. 
Lydekker says of this animal : ‘ This is the largest of the African species. 
Length of head and body from 22 to 26 inches. This species is distin- 
guished from all the above by the under surface of the ankle being hairy 
instead of nearly or quite naked, and also by its bushy tail. The general 
colour is blackish-gray, the longer hairs being ringed with black and 
white, and having the tip black.’ 
The fur of the tail varies in a remarkable manner, appearing sometimes to 
be black, and sometimes white (Thomas). 
Atkinson’s M ungoose {Helogale atkinsoni ) . 
Found at Hargaisa. 
Colour dark grizzled gray ; chest and belly brown ; muzzle blackish-brown. 
Head and body 192 millimetres; tail 153 ; hind-foot 41 ; ear 17. 
The Zebra M ungoose (CrossarcJms zebra). 
To be looked for on the Abvssinian boundaries. 
t/ 
Distinguished by the rufous colour of the under parts (Lydekker). 
The Somali Mungoose {CrossarcJms somalicus). 
Webbi Shebeyli. 
Colour grizzled ashy gray on head and fore- quarters ; long hairs of back 
indistinctly blackish and dull yellowish-white, so that the transverse 
dorsal bands are almost imperceptible, although they are distinctly 
present ; under surfaces very sparsely haired, grizzled gray without any 
mixture of rufous, except just on the chin ; limbs coloured like body ; 
tail has no black tip. Head and body 400 ; tail 250 ; hind-foot, 75. 
The Aardwolf {Proteles cristatus). 
Two young ones caught alive, and an adult skull picked up at Edegan, 
near the Toyo Plain. 
This remarkable animal is smaller than the hyaenas. It has a dirty yellow 
skin striped sparingly with dark brown. It possesses a long crest or 
mane down the centre of the back, the hairs of which are tipped with 
black. Long bushy tail ; upper part yellow, lower part black. Length 
