MAMMALIA MARSUPIALIA. 
39 
bright fulvous colour. A darkish stripe along the back, on both sides 
bordered with light fulvous ; besides this, on each side of the back, a 
reddish-black watered band length-ways ; body 4^, tail 3^ inches : from 
Swan river. Gray soon after described a specimen of the same genus 
under the name Tarsipes Spenserce. (Ann. of Nat. Hist. ix. p. 40.) 
Gervais asserts that this is identical with his own.* 
The genus Choeropus, hitherto incompletely known, Gray has defined 
more exactly and fully. (Ann. of Nat. Hist. ix. p. 41). The slender 
fore-feet have actually no more than two toes of the same length, and 
furnished with conical claws. The hinder feet have four toes, the outer 
ones very small, with a claw, the middle ones very strong and long with 
a compressed claw ; the two inner toes straight, weak, united up to the 
claws. Tail hairy with a small terminal pencil. Gray names the species 
described Ch. castonotis ; brownish-grey, beneath white, sides brownish ; 
length of body 10, of tail 3|, ear If inches. Lives in the bush at Murray, 
and was sent home by Captain Grey. He also got, in the same district, 
an animal like the Ch. ecaudatus, but with a strong tail. It is, according 
to him, certain, that from the skin of the first described specimen, the tail 
had been accidentally lost. 
I have, in the meanwhile, given the characters of ten new species of 
the genus Didelphys, in the Archiv. 1842, 1 Bd. p. 358. 
Lund has found, in the country investigated by him in the Brazils, 
Minas Geraes, in all seven living species of Marsupial Rats, (Det, K, 
Danske Vidensk. Selsk, Afh. viii. p. 236). He brings them into two 
divisions : — a. Large species, with long white bristly hairs projecting far 
over the others, 1. Didelphys aurita., Neuw., agreeing in all respects 
with the description of the Prince : 2, D. alhiventris, Lund ; very 
intelligibly described by Markgraf as the Carigueya, but unknown to 
all other authors. Head, neck, sides of the belly, hair of the back, at 
the root and posterior half of the tail, pale Isabella-yellow. Extremities, 
a band through the eye, another above the forehead, points of the hair 
on the neck, back, and sides, with the anterior half of the tail, black ; 
ears grey, with whitish tips. Whole length 22", of which the body con- 
stitutes one half ; ears 2" 3'". Distinguished from the D. virginiana, 
by its smaller size, longer tail, white belly, and larger ears. — h. Smaller 
* Gray was induced to the characterizing of a second species, chiefly per- 
haps by Gervais’ inexact description of its locality. Dr. Preiss, to whose 
kindness I am indebted for the sight of two specimens of this remarkable 
little animal, assured me that it is quite unknown at Swan River. The indivi- 
duals brought by him, he received from the natives, at St. George’s Sound, who 
call it Nulbingar. Gray’s also came from the same place. It lives in holes of 
trees, and feeds on fruits and insects. There remains no doubt of the identity 
of the species of Gervais and Gray. — Editor of Archiv. 
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