14 Bulletin American Museum o} Natural History [Vol. XL VII 



General coloration of the upperparts strongly yellowish white superficially, the 

 broad light tips of the spines being of this color and nearly concealing the dark sub- 

 terminal zone. Head in front of eyes, including sides of nose, dull tawny-brown; 

 also ears and feet the same in general effect ; a broad frontal band, cheeks, sides of 

 neck, sides of shoulders and forearms, thighs and hind legs, rump and whole under- 

 pays uniform dull yellowish white (possibly white slightly stained yellowish) ; upper 

 surface of fore feet slightly clothed with yellowish-white hairs, hind feet more heavily 

 clothed with longer yellowish-white hairs, through which the pale tawny color of the 

 skin determines the general effect; tail similar in coloration to the feet. Spines 

 broadly tipped (for about 4-5 mm.) with yellowish white (without darker tips); 

 subapical band (about 5 mm.) dark tawny-brown, passing proximally into dull yel- 

 lowish white on the basal half. Longest head spines about 17 mm. in length, body 

 spines about 15 mm. 



Collectors' measurements: total length (type), 249 mm.; head and body, 230; 

 tail, 19; hind foot, 29; ear, 30. Topotype (very old female with greatly worn teeth) : 

 total length, 205; head and body, 180; tail, 25; hind foot, 26; ear, 30. 



Skull measurements: condyloincisive length, (type) 45.1, (topotype) 43.6; 

 length of nasals, 16.5, 15; palatal length (to front of premaxillse) 25.4, 24.7; zygo- 

 matic breadth, 27.7, 26.3; interorbital breadth, 11.8, 11.5; breadth of braincase, 

 19.5, 19.9; postglenoid breadth, 22, 20; mastoid breadth, 15.5, 16.5; palatal breadth 

 (outside to outside of m 1 ), 17.6, 16.8; breadth of rostrum at base of front incisor, 6, 5.4; 

 breadth of palate at ridge behind m 3 , 9.7, 8.5; tip to tip of alisphenoid processes, 

 11.2, 11.3; tip to tip of pterygoids, 6.1, 6.7; length of mesopterygoid fossa, 10.7, 

 10.2; breadth between pterygoids, 2.8, 2.7; length of upper toothrow (i'-m 3 ), 21.5, 

 21.5; upper molars, 8.1, 8.1; lower toothrow (to tip of i 1 ), 9.7, 8.2; lower molars, 9.9, 

 9.8; length of mandible (front of symphysis to posterior border of condyle), 34.5, 

 34.2; depth, angle to coronoid, 17.7, 16.7. 



The skull is large and heavy; the nasals are long and narrow, the premaxillae 

 greatly extended posteriorly, meeting the frontals and excluding contact of the maxil- 

 lae with the nasals ; zygomatic arches narrow as in A . pruneri; mesopterygoid fossa 

 very broad, the pterygoids and alisphenoids heavily developed and widespreading as 

 in A. hinolei (the reverse of what is seen in A. pruneri 1 ); dentition heavy, as in A. 

 langi and A. hindei. 



The pattern of coloration is as in A. pruneri, differing from that of 

 langi and hindei in having the space below the eye white instead of black- 

 ish. The spines are as in pruneri — short and fine instead of long and 

 coarse, and those of the frontal border not conspicuously lengthened as 

 in the hindei group. The general coloration of both spine-tips and hair 

 is more yellowish and less clear white than in pruneri; the nose and basal 

 color of the feet and ears is tawny instead of blackish as in pruneri and 

 in hindei. This however may be subject to considerable variation through 

 seasonal and other conditions. 



x The specimen of A. pruneri here employed in comparison is No. 14446, Mus. Comp. Zool., a young 

 adult male (teeth unworn), collected at Fazogli, Blue Nile, by Dr. G. M. Allen and recorded by him 

 (Bull. Mus. Comp. Zool, LVIII. p. 342, July, 1914) as Erinaceus albiventris pruneri. 



