VERTEBRATA. 341 
cerebellum is never completely covered. Both pairs of 
limbs are well developed, the front being prehensile; but 
the clavicles are 
rudimentary. The 
humerus and fe- 
mur are mainly 
inclosed in the 
body. The digits, 
never less than 
four, always have 
sharp and pointed 
claws.”” The body 
is covered with 
abundant hair. 
Carnivores are divided according to the modifications 
of the limbs: a. Pinnigrades, having short feet expanded 
into webbed paddles for swimming, the hinder ones being 
bound in with the skin of the tail. Such are the Seals, 
Walrus, and Eared Seals, or Sea-lions. 6. Plantigrades, in 
which the whole, or nearly the whole, of the hind foot 
forms a sole, and rests on the ground. The claws are not 
Fig. 339.—Red Fox (Vulpes fulvus), United States. 
a —————<—=> —_—» 
Fie. 340.—Southern Sea-lion (Otavia jubata). Antarctic Ocean. 
retractile; the ears are small, and tail short. Bears, Bad- 
gers, and Raccoons are well-known examples. ce. Digiti- 
