66 LLOYD'S NATURAL HISTORY 
Eabits.—Like the other members of the genus, this species 
appears to prefer ground covered with low bush or long grass. 
Mainly nocturnal, it is said to be always scratching the ground 
in search of the roots on which it feeds, and in cultivated dis- 
tricts it inflicts much harm on the potato crops. 
TIE PLAIN RAT-KANGAROOS. GENUS CALOPRYMNUS. 
Caloprymnus, Thomas, Cat. Marsup. Brit. Mus., p. 114 (1888). [ 
Nose naked; ears short and rounded ; fore claws long, and 
strong ; hind feet longer than head, with the naked soles coarsely 
granulated ; tail thin, cylindrical, evenly short-haired, without 
crest. In respect of the conformation of the skull, the single ; 
representative of this genus agrees with Bettongia, but the 
molar teeth are like those of Zépyprzymnus, while the last pre- | 
molar resembles that of Potorous, the nasal region of the skull i 
being peculiar. The species is thus intermediate between the — 
other members of the sub-family, and affords some grounds for | 
the inclusion of the whole of them in the single genus | 
Potorous. 
1. PLAIN RAT-KANGAROO. CALOPRYMNUS CAMPESTRIS. 
Bettongia campestris, Gould, Proc. Zool. Soc., 1843, Pp. SI. 
Hypsiprymnus campestris, Schinz, Syn. Mamm., vol. il, Suppl. 
p. 47 (1845). 
Caloprymnus campestris, Thomas, Cat. Marsup. Brit. Mus., p. 
115 (1888). 
Characters._Size large; form delicate and slender; face : 
broad between the eyes ; fur soft and straight. General colour | 
grizzled grey, darker on the back, brighter on the flanks ; under- 
parts pale sandy-white ; ears very close, short, with yellow | 
hairs. Legs bright sandy rufous; feet white, short-haired ; 
