ZZ LLOYD’S NATURAL HISTORY, 
scmewhat paler than in the last species; the uniform rufous of 
the back gradually becoming paler on the flanks, till it passes 
into whitish-rufous or white on the under surface ; black eye- 
mark very distinct, and extending forwards on the sides of the 4 
muzzle nearly to the nose ; inner sides of limbs like under-parts ; _ ! 
feet white or pale brown, nearly naked. Ears large, with the 
anterior basal projection, short, rounded, and frequently almost 
wanting. Thirteen or fifteen teats. Fifth hind toe very 
slightly shorter than the second ; foot-pads, low, rounded, and 
but slightly prominent. ‘Tail long, slender, tapering, with its 
base scarcely furred, in colour uniform pale-grey, becoming 
lighter inferiorly. Length of head and body in male about 
34 inches ; of tail 4 inches ; females slightly larger. 
Distribution—Brazil, from Santarem to Rio Grande do Sul. 
Nothing specially noteworthy appears to have been recorded 
as to the habits of this beautiful little creature. 
XII. GREY OPOSSUM. DIDELPHYS GRISEA. 
Didelphys grisea, Desmarest, Dict. Sci. Nat., vol. xlvii., p. 393 
(1827); Thomas, Cat. Marsup. Brit. Mus., p. 349 
(1888). 
Didelphys incana, Lund, Blik. Brasil. Dyr., Dansk. Afhand., 
vol. vili., p. 237 (1841). 
Micoureus griseus, Gervais, Hist. Nat. Mamm., vol. il., p. 287 
(1855). 
Characters.—Size nearly as inthe Murine Opossum ; fur close, 
soft, and somewhat fluffy. General colour uniform deep grey, 
with scarcely a tinge of rufous ; face somewhat paler, with the 
dark eye-mark inconspicuous and confined to the front of the 
eyes ; under-parts pure white, sharply defined from the grey of | 
the back, the line of demarcation being often indicated by a 
tinge of fulvous or rufous ; back of fore limbs white, sometimes ., 
