102 DR, J. E. GRAY ON THE MUSTELIDE, [Jan. 24, 
tt. Foot oblong; toes rather slender, free at the end, bluntly or 
imperfectly clawed ; pad of palm large, of toes slender, sepa- 
rated. 
13. Aonyx. Skull broad, depressed. 
++ The palms and soles of the feet slightly hairy between the pads; 
the two inner hinder toes with a band of hair on the inner side 
of the under surface. Muzzle bald, transverse. 
14.. Hyprogaue. Claws acute. Skull elongate; orbits not de- 
fined behind, without any superior orbital prominence. Hind 
feet elongate. Toes slender, broadly webbed. 
+++ Palms and soles of feet hairy between the pads. Muzzle bald 
between the nostrils, and produced into an angle on the upper 
edge. 
15. Latrax. 
B, Tail subcylindrical, elongate, covered with hair, and with a nar- 
row fringe-like expansion on each side. Hind feet elongate. 
16. PrerRonuRA. 
Tribe 3. Enuyprina. Head depressed. Feet large, elongate, 
rather fin-like, hairy above and below. Tail short, cylindrical. 
Grinders massive, flat-crowned. 
17. ENuYDRA. 
Section II. Puarypopa. The feet elongate; toes straight ; claws 
exserted, blunt. 
A. Plantigrade. Hind feet broad, depressed; soles bald, callous 
nearly to the heel ; toes short, thick ; claws thick. Body keavy. 
Tail short. Ears short, rounded. 
Tribe 4. Mexina. Tubercular grinder large, oblong, elongate. 
Palate produced behind. Flesh-tooth with two more or less 
distinct tubercles on inner lobe. 
* Palate much produced behind ; hinder opening in a line with the 
condyles. 
18. Arcronyx. Tubercular grinder elongate. Nose of skull rather 
produced and contracted. 
** Palate moderately produced behind ; hinder opening in a line 
with the middle of zygomatic arch. 
19. Mexes. Tubercular grinder elongate, oblong. Nose of skull 
broad. Flesh-tooth moderate, trigonal ; inner lobe with a single 
ridge. 
