EEINACEUS iETHIOPICUS. 
161 
of a few dusky hairs below the lateral spines; in some individuals there are spots on 
the throat, chest, and belly ; the mesial area of the inner surface of the ears white; 
occasionally a dark spot on the forehead and another on each side of it. Spines 
broadly tipped with white, with three obscure brown bands, subapical, submesial, and 
basal; or the spines may be wholly yellowish white, with the exception of a very 
feebly indicated, almost obsolete, darker subapical area. 
In some specimens, chiefly males, there is a pale yellowish broad longitudinal area 
along the hack, with a brown area external to it, the sides of the animal being 
yellowish ; in others there is only the pale dorsal band: these variations are due 
to the extent to which the yellow tips of the spines are developed in these areas. 
In other specimens the fur generally, instead of being white, is dirty yellowish, 
darker from the snout to the eye and below the eye ; and rusty brown, more or less, 
on the fore limbs, rump, hind feet, thighs, tail, and belly between the thighs. 
Measurements. 
Durrur. 
Suakin. 
Suakin. 
Tunisia. 
d. 
d. 
$. 
d. 
No. 70. 
No. 24. 
No. 27. 
mm. 
mm. 
mm. 
mm. 
Snout to vent. 
.... 185 
180 
180 
143 
Vent to tip of tail. 
.... 22 
17 
17-8 
19 
Height of ear. 
.... 37 
38 
37-3 
35 
Breadth of ear. 
.... 24 
23 
20 
24 
Snout to eye. 
.... 25 
25 
23 
23 
External meatus to snout .... 
.... 50 
49 
49-7 
50 
Elbow to tip of 3rd finger .... 
.... 62 
62-3 
61 
60 
Length of fore foot. 
.... 21 
21-2 
18 
21 
„ hind foot. 
.... 30-2 
30 
27 
29 
Hallux, excluding claw. 
.... 2-4 
2-1 
2 
2 
Pollex, excluding claw. 
.... 4 
3-9 
3-9 
3-8 
The skull of E. cethiopicus is readily distinguished from that of E. auritus by its 
shorter and more pointed muzzle, and by the greater breadth of the squamosal portion 
of the zygomatic arch as compared with the anterior portion. But when the palatal 
aspect of the macerated skull is examined it will be found to differ in a very marked 
degree. The auditory bullae are enormously inflated, and all the surrounding 
bones in the skull are similarly modifled to assist in enlarging these chambers ; 
the base of the squamosal is greatly enlarged and bullate; the pterygoids are hollowed 
out and inflated so that the lateral fossae are quite obliterated, the auditory chambers 
extending within the whole length of these bones The second upper premolar 
1 This extraordinary development of the auditory chamber is found in the nearly allied hedgehog from 
Southern Arabia, E. dorsalis, Anders. & de Wint. (Ann. Mag. Nat. Hist. ser. 7, vol. vii. 1901, p. 42); and 
to a slightly modified extent in the Indian species E. micropus and E. pictus (two species which differ from 
cue another only in the very extraordinary character of the absence of the malar bone in the former). 
