202 LLOYDS NATURAL HISTORY. 
ceding species. Muzzle with one pair of lateral notches in the 
lip ; ears very large, broad, rounded, naked, transparent, and 
of a uniform slaty-grey colour. Pouch rudimentary or wanting. 
Nine teats. Front of limbs, inner side of lower part of hind 
legs, and feet pale brown. Feet longer and narrower than in 
the last, with their pads very distinctly defined, and those of 
the first toe in each foot generally undivided ; the outermost 
hind toe scarcely reaching to the middle of the second joint of 
the fourth. Tail of great length, with its basal inch alone 
haired, elsewhere naked, save for a few short hairs between the 
scales, and its general brown colour changing to white at the 
tip. Length of head and body about 9% inches ; of tail 1134 
inches. 
Distribution—Costa Rica to Brazil. 
The distinctive features of this species, which is very abun- 
dant in Brazil, and especially at Bahia, are the small spots above 
the eyes, coupled with the great length of the tail and the 
shortness of its furred portion. ‘The absence of a pouch in a 
species otherwise so closely allied to D. ofossum is very remark- 
able, indicating differences in the habits of the young, and also 
showing that the present is the more specialised form of the 
two. 
IV. THICK-TAILED OPOSSUM. DIDELPHYS CRASSICAUDATA. 
Didelphys crassicaudata, Desmarest, Nouv. Dict. d’Hist., vol. 
xxiv., table, p. 19 (1804); Thomas, Cat. Marsup. Brit. 
Mus., p. 334 (1888). 
Didelphis macroura, MWliger. Abhandl. Akad. Berlin, 1811, 
p. 107. 
Metachirus crassicaudatus, Hensel, Abhandl. Akad. Berlin, 
£572, (p-.121- 
Dideipliys turner, Giinther, Ann. Mag. Nat. Hist., ser 5, vol, 
iv., p. 108 (1879). 
