DOGS. — BEARS. 
75 
the number is increased to 46 or 48, beiug the largest number 
present in any placental heterodont mammal. Of the specimens 
CKhibited, the most noticeable are the skeletons of the African 
Hunting-dog (Lycaon venaticus), Red Wolf (Cams jubatus) of 
Buenos Ayres, Dingo, Coyote, &c.; and also the collection of 
skulls and skeletons of the various races of the common Dog 
(Canis familiar is) in Div. B. 
The MustelidiB, or Weasel family (Case 5, Divs. E & E), have 
thoroughly carnivorous habits, and therefore strong and well-deve- 
loped teeth. Skulls of the Otter and Badger are mounted so as to 
show the teeth from below. The latter animal has its lower jaw so 
articulated to the cranium that it cannot be separated from it with- 
out breaking the bone. All the Mustelidce have broad flattened 
skulls, low vermiform bodies, short legs, and feet fitted either for 
running, digging, or swimming. In the Sea-Otter (^Latax, better 
known as Enhydra lutris) the hind feet are modified into flippers, in 
which the fifth toe is the longest and stoutest, thus approaching the 
Fig. 34. 
Fin-footed Carnivores or Seals. Its teeth are enormously broad and 
powerful, with rounded tubercular cusps well adapted for breaking 
the hard shells of crustaceans and mollusks, on which it is supposed 
to feed. Alone among the Carnivora Fissipedia, the Sea-Otter has 
only two lower incisors. 
The Frocyonidos and Mluridm^ aberrant fruit-eating members of 
the great Order of Carnivores, are placed in Div. F. 
The Bears (Ursidce) occupy Case 6. In their skeletons, as in [Case 6.] 
their external appearance, they are heavy and clumsily built, and 
their bones are thick and massive. Their sectorial teeth have 
broad surfaces, and are but little adapted for cutting, their whole 
