49 BETTONGIA. 
Dimensions.—Head and body about eighteen inches; tail about 
fifteen inches. 
Habitat.—Tasmania. 
References.—Thomas, B.M. Catal. p. 106, pls. xiii. fig. 8 (fourth 
premolar ), xiv. figs. 1 (nasals), 2 (bulla); Gould, Mamm. Austr. 
ii, pl. Lxiii. 
3. BETTONGIA GAIMARDI, Desmarest, sp. (1822). 
Gaimard’s Rat-Kangaroo. 
Fig. 3. 
Side view of skull, showing dentition. 
Fur woollier than in the other species. General colors as in 
B. lesweuri, but the general tone rather more yellowish or fawn. 
Hind feet white. Distal two-thirds of the tail growing gradually 
darker, and the hairs lengthening, till, on the terminal third, 
there is a distinct black crest ; below short-haired, white. 
Dimensions.—Head and body about sixteen inches ; tail about 
eleven inches. 
Habitat.—New South Wales. 
References.—Thomas, B.M. Catal. p. 108, pls. xiii. fig. 10 (fourth 
premolar), xiv. figs. 3 (nasals), 4 (bulla); Gould, Mamm. Austr. 
4, BETTONGIA PENICILLATA, Gray (1837). 
Brush-tailed Kangaroo-Rat. 
Fur and general colors not definitely different from the other 
species. Hands and feet pale brown. Bristly hairs of feet not 
hiding the claws. Tail long, with a prominent black crest along 
the terminal one-third or two-thirds of its upper surface; below 
pale brown. 
Dimensions.—Head and body about fourteen inches; tail about 
twelve inches. 
