XERUS ERYTHOPUS. 45 



base, further ringed with black and white, the tip always 

 being white. 



The hairs of the side-streaks are white throughout, only 

 a few being brown tipped. 



A white circle surrounds the black eyes. Whiskers black. 

 Ears a little more developed ^than in Xerus rutilus, but 

 this may perhaps be merely a relative difference, because 

 Xeriis erythopus is in all its proportions a stronger animal 

 and of a considerably larger size. 



ra. m. 



Length of head and body 297 



» » tail with hairs 300 



» » » without hairs 230 



» » hind foot 73 



» )) skull 62 



Width between the jugalia (incomplete) . . about 34 



» » » orbits 16 



Length of upper molar series 12.5 



Distance between incisor and first upper molar . . 13.5 

 There are five molars in each upper and four in each 

 lower jaw: here the fifth molar, as usual when this tooth 

 is developed , is very small. Incisors smooth , light orange 

 'or yellowish. It seems that exceptionally fullgrown indi- 

 viduals have pure white incisors, for instance this is the 

 case in two specimens in the Museum at Prague. A skull 

 in our collection (vide infra N*^. 21) has the lower incisors 

 and an upper one pure white, the other upper incisor 

 being yellowish. In young individuals the small foremost 

 upper molar is absent and the incisors always have a white 

 or yellowish white color. I observed this in all the young 

 specimens from Senegal , Liberia , Gold-coast and Bogos in 

 the Leyden Museum , from Kitui and Chinxoxo in the Ber- 

 lin collection , from an unknown locality in the Munich 

 Museum and also in two specimens from Bogos in the Stutt- 

 gart collection. 



N. i. Schillu (Riippell) and Sabera (Rüppell). 



Hab. Senegal; Sierra Leone; Liberia (Büttikofer and Sala) ; 



Notes from tUe Leyden IMuseum , Vol. IV. 



