CARNIVOROUS QUADRUPEDS, 



65 



105. The Walrus, Fig. 47, is an aberrant species. In 

 general form and habits it is like the larger Seals. Its 



chief peculiarity is the 

 great length of the ca- 

 nine teeth of the upper 

 jaw, sometimes reach- 

 ing to two feet. These 

 tusks are of service m 

 defense,in progression, 

 and in gathering its 

 food. It resists with 

 them the attacks of 

 the Polar Bear ; it uses 

 them as hooks in clam- 

 bering up rocks and 



icebergs, and it draws up with them the seaweed which 

 is a part of its food. It is found in the Arctic regions of 

 both hemispheres, and is sought after for its oil and its 

 tusks. 



Questions. What are included in the family of Ursidae ? Why are 

 they called Plantigrade animals? What are Digitigrade animals? 

 How far are the Ursida? carnivorous ? What is an omnivorous ani- 

 mal ? What are the habits of this family ? What is the type-genus 

 of the family ? How many species are there of this genus, and where 

 are they found ? What is said of their structure? What of their useful- 

 ness to man ? What is said of the Grizzly Bear ? What of the Polar 

 Bear? What are some of the aberrant species of the Ursidae? What 

 is said of the Raccoon? Of the Badger? Of the Wolverine? Of 

 the Kinkajou ? What are the Phocidae ? W T hy are they called am- 

 phibious ? Describe the structure and habits of Seals. What is said 

 of their usefulness to man ? Where are they found ? Describe the 

 common Seal. What is said of the Elephant Seal? Of the Fur 

 Seal? Of tke Walrus? 



