434 SOUTH AMERICAN WEESEL. 
Opossum in most particulars, except in the appear- 
ance of the tail. 
The following obscure and somewhat uncertain 
species of this numerous genus, seem scarce suf- 
ficiently known to justify a decided specific cha- 
racter for each. I shall, therefore, merely men- 
tion them in as few words as possible. 
GREV-HEADED WEESEL. 
La Grande Marte de Gulane. Byff. suppL 7. p. 250. pi. 60. 
This is black, with the head and sides of the 
neck greyish ; and the throat and under side of 
the neck white. It measures above two feet from 
nose to tail, which measures eighteen inches. It 
is a native of Guiana. 
SOUTH AMERICAN WEESEL. 
La Fouine de la Guiane. Bitf. suppl. 3. p. 161, pL 23. 
This measures from nose to tail twenty-one 
inches and a half, and has a general resemblance 
to a Polecat, but the tail is rather shorter in pro- 
portion : the nose is long and sharp, and with the 
cheeks, throat, and sides of the neck, black : the 
forehead and sides of the head, to the ears, white : 
the ears short, round, and edged with white. 
