DIDELPHYS ORNATA. 
525 
arrived in England, and the author, having been favoured by 
Mr. Gould with the loan of this work, is enabled to notice 
certain Peruvian species of Opossum described by Dr. 
Tscliudi, which that naturalist regards as new to science. 
These are respectively named Didelphys ornata , D. nocti- 
vaga , and D. imp avid a. 
Didelphys ornata . 
* 
Didelphys ornata. Tschudi, Fauna Peruana, Pt. 2, PI. 7, and Pt. 4, p. 14G. 
1845. 
Fur dense, and somewhat woolly; on the upper parts of the body 
of a rusty brown colour, suffused with black; on the under 
parts grey-white; chest pure white: head with a blackish 
mesial line, on each side of which are two longitudinal grey 
lines; muzzle dusky; ear encircled with brown, the brown 
extended forwards on to the sides of the muzzle, and back¬ 
wards to the ear: between the shoulders is an oblong, but 
nearly heart-shaped, white patch. About half the tail 
is clothed above with *fur like that on the body ; the naked 
portions are yellowish : ears large and naked, and of a brown- 
red colour. 
Inches. Lines. 
Length from nose to root of tail . 11 0 
44 of tail ... ... ... . 12 0 
44 of hairy portion of ditto, above ... 6 6 
44 of ditto, below ... 3 6 
44 of bead ... ... ... ... 2 6 
44 of ears ... ... ... ... ... 1 0 
Width of ditto ... ... ... ... 9 
Length of fore foot ... ... . 1 0 
“ of hind ditto ... ... ... 1 3 
The description, it will be seen, accords in all essential 
points with my account of D. Derbiana. The pale mark on 
the back, it would appear, is more expanded in Dr. Tschudi s 
