1865. ] DR. J. E. GRAY ON THE MUSTELID&. 125 
The muzzle hairy in the middle in front ; upper and front edge of 
the nostrils bald and callous; the ears oblong, hairy. Toes strong, 
covered with hair above, half webbed; webs bald; claws strong, 
acute; palms and soles bald; pads well developed and divided. 
Tail conical, covered with hair. Skull dilated behind; nose very 
short, broad ; forehead broad, flattened above ; hinder edge of orbit 
marked with acute tubercles above and below; flesh-tooth with a 
very large rounded internal lobe extending the whole length of the 
tooth ; tubercular grinders rather broader than long. 
The under-fur very soft, scattered with short stiffer hairs. 
1, Lonrra ENHYDRIS. B.M. 
The hair on the centre of the nose forming a broad erect band; 
fur dark chestnut-brown ; the sides of the face, under the ears, and 
upper part of the throat yellowish. 
'Lutra enhydris, F. Cuvier, Dict. Class. H. Nat. xxvii. 243 ; 
Fischer, Syn. 226. 
Hab. Cayenne (B.M.). 
M. F. Cuvier does not describe the peculiarity of the muffle ; so 
that I am not certain that this is the species he describes. 
2. LONTRA BRASILIENSIS. . B.M. 
The hair on the centre of the nose forming a narrow erect band ; 
fur pale brown, ; upper lip, chin, and beneath rather paler. 
Lutra brasiliensis, Ray, Blumenb. Abbild. t. 93; F. Cuvier, Dict. 
Sci. Nat. xxvii. 244. 
Lutra brasiliana, Shaw, Zool. i. 446. 
Lontra brasiliensis, Gray, List B. M. 70; Ann. and Mag. N. H. 
118; Gerrard, Cat. Bones, B. M. 100. 
Lontre @ Amérique, Cuv. Régne Anim. i. 151, t. 1. f. 3. 
Hab. Brazil (B.M.). 
3. Lontra? INSULARIS. 
Pale chestnut-brown, sides paler ; sides of head and belly, lips, 
chin, throat, and chest yellowish white ; under-fur short, very soft ; 
hairs short and very smooth. 
LIutra insularis, F. Cuvier, Dict. Sci. Nat. xxvii. 345. 
Hab. Trinidad. 
* Muzzle bald on the upper edge and between the nostrils, form- 
ing a cross band with a straight upper and lower edge ; orbit 
of skull defined behind by conical processes. 
+ Foot oblong ; toes short, webbed to the claws, sharply clawed ; 
pads of toes and palm large, close together. 
11. Lurra. 
The muzzle bald, oblong-transverse, with a straight upper and 
lower edge; the upper edge of the nostrils bald; the ears oblong, 
