.ZV^o.2.] TEOUESSAET ON REVISION OF THE GENUS SCIURUS. 307 



P, Head lengthened, front flat, post-orbital processes little devel- 

 oped ; muzzled compressed ; tail cylindric, longer than the body ; ears 

 very short and rudimentary. Fore claws strong and arcuate ; pelage 

 spiny, of bristly hairs mixed with flattened si)ines ; belly naked ; back 

 striped. Molars f . Habits terrestrial. Size medium. — Subgenus Ge- 

 osciURUS, H. Smith, 1849 (emend. Gray, 1867). 



African : 



1. setosus, Forst. {capensis, Thumb.). 2. erytliropus, F. Q\x\.{leucum'brinus, 



Eiipp.). 



Q, Characters of the precedent still more strongly pronounced; pelage 

 almost entirely composed of flat, grooved spines; back not striped; ex- 

 ternal genitals of the male highly developed. Habits terrestrial. Size 

 medium. — Subgenus Xerus, Hemp. & Ehrenb., 1832 (emend. Gray, 

 1867). 



African : 



1. rutilus, Eiipp. (brachyotua, H, «&. E. ; 3. ddbagala, Heugl. 



type). 4. fuscus, Hue.t, 1880. 



2, flavHS, A. M.-Edw. 



The three last subgenera together form the genus Xerus auct., notably 

 of M. Huet {loc. cit.) and of Mr. Alston {On the Classif. of the Order 

 Glires, P. Z. S., 1876, p. 77). 



The complete synonyms of all these si)ecies will be given in our Cata- 

 logue des Mammiferes Vivants et Fossiles (Eodentia). 



