214 Annals of the South African Museum. 



white hairs concealing the claws ; tail a little shorter than the head 

 and body with a short, scanty covering of bristles, black above white 

 below (Smith). 



This species seems allied to M. pacdnlcns and N. auricomis. 



Dimensions. Head and body 5'50 ; tail 4'75. 



Distribution. Narnaqualand. 



MUS CAFFER. 



Mas caffer, A. SMITH, S. Afr. Quart. Journ., ii., p. 157 (1834). 



Description. General colour blue-grey or brown-grey, lighter on 

 the sides, below greyish white ; all the fur very long and soft ; ears 

 long and oval, the inner surface with a sprinkling of minute white 

 hairs the outer with blackish hairs ; feet greyish white ; tail thinly 

 covered with very short fine greyish hairs (Smith). 



Dimensions. Head and body 3'50 ; tail 3'0. 



Distribution. Kaffirland. 



MUS MUSCARDINUS. 



Mus muscardinus, WAGNEB, Schreb. Saugeth. Suppl., iii., p. 430 

 (1843). 



Description. Rusty yellow above, white below, ears naked; feet 

 white, tail shorter than the head and body, clothed with dark bristles 

 above and white ones below. 



Dimensions. Head and body 5-10 ; tail 3 -20 ; hind foot -75. 



Distribution. Kaffraria, collected by Krebs. 



GEN. SACCOSTOMUS. 



Saccostomus, PETERS, M. B. Akad. Berlin, p. 258 (1846). 

 Type S. campestris. 



Description. Robust, mouse-like animals with internal cheek 

 pouches, short tails and limbs ; skull with the infraorbital opening 

 not much narrowed below but more or less triangular ; incisors 

 small not grooved ; molars like those of Mus but with the tubercles 

 soon lost, so that in most specimens the teeth consist of transverse 

 ridges of enamel with depressions between. 



This genus is allied to Mus, but differs in its shorter tail and in 



