30 PSEUDOCHIRUS. 
Dimensions. — Body and head about fourteen inches, tail nearly 
the same length. 
Habitat. —Tasmania. 
References.—Thomas, B. M. Catal. p. 176, pls. xviii. fig. 7 
(jaws); xix. fig. 4 (upper view of skull); Gould, Mamm. Austr. 
ipl. xix. 
3. PSEUDOCHIRUS OCCIDENTALIS, Thomas (1888). 
Western Ring-tailed Opossum. 
Size moderate. General color above deep smoky-gray; below 
white. Ears thinly hairy, the white spot on the posterior margin 
small. Hands and feet darker than the rest of the limbs. White 
tip of tail extending over five or six inches ; naked part below 
smooth, about four inches long. 
Dimensions.—Head and body about thirteen inches ; tail about 
twelve inches. 
Habitat.—West Australia. 
References.—Thomas, B.M. Catal. p. 174, pls. xviii. fig. 6 
(upper jaw); xix. fig. 3 (upper view of skull). 
4, PSEUDOCHIRUS PEREGRINUS, Boddaert, sp. (1785). 
Common Ring-tailed Opossum. 
Size large. General color above gray or rufous in varying 
proportions ; below white, grayish-white, or rufous. Region 
round the eyes often prominently rufous. lars rather large, 
their backs usually gray anteriorly with the posterior white patch 
distinct, sometimes uniform rufous. Outer side of arms and legs 
rufous. Hands and feet white or pale rufous. Middle third of 
tail black or nearly so ; from one to four inches of the tip white ; 
naked part beneath smooth, transversely striated, from one to 
four inches long. 
Dimensions.—Head and body about sixteen inches ; tail about 
fourteen inches. 
Habitat.—Eastern Australia from Southern Queensland to 
South Australia. 
References.—Thomas, B. M. Catal. p. 172, pls. xvii. fig. 4 
(ear); xvill. fig. 5 (jaeus); xix. fig. 2 (upper view of skull); 
Gould, Mamm. Austr. i. pls. xviii. (P. cooki), xx. (P. lanuginosa). 
5, PSEUDOCHIRUS HERBERTENSIS, Collett, sp. (1884). 
Herbert River Opossum. ‘Oota’ of the Aborigines 
Size moderate. Fur thick, close, and woolly. General color 
above dark umber-brown ; below, chin brown, chest and _ belly 
white, or grayish-white with irregular white patches, ars short, 
