528 
DIDELPJIYS crYIERI. 
with young, was killed at a spot having an elevation of more 
than 12,500 feet above the sea: in the hot, woody parts, it 
disappears, and it is very rare on the east slope of the coast 
Cordilleras at an elevation of 6\000 feet above the sea. 
Didelphys wyosuros (or D. tmdicaudata) and I). Opossum, 
live in the districts of the coast, and the forest ; the former 
also occurs in the Sierra region at an elevation of from 9,000 
to 10,000 feet above the sea; the latter has not been found 
above the Ceja region. The three species D. noctivaga , D. 
impavida , and D . ornata , have hitherto been exclusively 
found in the middle and deep forest regions, and the climate 
at an elevation above 0,500 seems to be unfitted for them. 
Their horizontal range is also small, since they have only been 
met with between die 10th and 12th degrees of south latitude. 
D. murinn, on the other hand, has a wide horizontal range, 
being found throughout the whole of the northern parts of 
South America, from the Atlantic to the foot of the inner 
Cordilleras. 
Didelphys Cucirri (Fossil). 
Didtlphy* Curirri. Fisciiku, Synop#i* Mammalium, p. 2Gfl. 
Dr. Fischer gives the above name to the animal whose skeleton 
was discovered by Cuvier in the Eocene Ternary formation of 
the Paris basin. The skeleton in question agrees most nearly 
in size with that of the Didelphys murina . but die sepa¬ 
rate bones differ in their proportions. It exliibits distinct 
marsupial bones ; die angle of die lower jaw was found to be 
bent inwards, as in the Marsupialia, and the true molar teeth 
remaining in the fractured skull, agree with tliose of the 
Opossums, both in number and form. In fact, very satis¬ 
factory evidence is deduced by Cuvier from this skeleton, to 
