40 POTORUS. 
3. Pororous TRIDAcTYLUS, Kerr, sp. (1792). 
Common Rat-Kangaroo. 
Size variable, large, or medium. Other external characters aS 
in P. gilberti, but the naked part of the rhinarium extends rathe" 
further backwards. 
Dimensions.—Head and body about sixteen and a half inches ; 
tail about nine inches ; hind foot from two-thirds to four-fifths of 
an inch, 
Habitat.—New South Wales, Victoria, South Australia and 
Tasmania. 
References.—Thomas, B.M. Catal. p. 117, pls. xi. fig. 13 (rhin- 
arium ), xiii. fig. 12 (fourth premolar ), xiv. fig. 10 (nasals); Gould, 
Mamm. Austr. ii. pls. xvii. (P. murinus ), Ixviii. (P. apicalis). 
The two Tasmanian forms, P. aprcalis which is larger and P. 
rufus which is smaller than continental examples may prove to 
be good species. 
Genus IIJI.—CALOPRYMNUS, Zhomas (1888). 
Rhinarium naked. Ears short and rounded. Fore-claws long 
and strong. Hind feet longer than the head, their soles naked 
and coarsely granulated, Tail thin, cylindrical, evenly short- 
haired, without trace of crest. 
+) 1.2.3 1 0.0 3.4 1.2.3.4 5) = 
Dentition.—1L. 10.0? CO: ri lee 0.0.34 M. 12.34 x 2 = 34. 
Habits.—Terrestrial; herbivorous. 
1. CALOPRYMNUS CAMPESTRIS, Gould, sp. (1843). 
Plain Rat-Kangaroo. 
Size large. Form slender and delicate. Face broad between 
the orbits. Fur soft and straight. General color above grizzled 
sandy, darker on the back, brighter on the sides; below pale 
sandy-white. Ears with close, short, yellow hairs. Arms and 
legs bright sandy rufous; hands and feet white, the hairs quite 
short. Tail sparsely clothed with pale yellowish hairs, which are 
closest on the underside of the tip. Centre of chest naked and 
apparently glandular. 
Dimensions.—Head and body about eighteen inches ; tail about 
fourteen inches. 
Habitat.—South Australia. 
References.—Thomas, B.M. Catal. p. 115, pls. xiii. fig. 11( fourth 
premolar), xiv. tig. 9 (upper view of skull); Gould, Mamm. Austr. 
ii. pl. 1xvi. ood 
