38 THE ANIMAL KINGDOM. 



developed at their birth, and (2) those who, being fish-like 

 in form and habits, are still mammalian in all other con- 

 siderations we can now divide all others into two great 

 groups, viz. : 



Ungulated, or such as have their fingers or toes more 

 or less consolidated and enclosed in hoofs. 



Unguiculated, or such as have separate fingers and 

 toes, terminated by distinct nails or claws. 



The Ungulated at once fall into two groups, viz. : 



1. Pachydermata,* or thick-skinned, as the Elephant, 



Hog, &c. 



2. Ruminants, or cud-chewing animals, as the Ox, 



Sheep, &c. 



The Ungulated Pachydermata may be divided into' 

 six families, which are represented by 



1. The Elephant, which has five toes enclosed in a sort 

 of hoof, so that only their ends are visible. 



2. The Hippopotamus. 



3. The Hog. 



4. The Tapir. 



5. The Rhinoceros, and 



6. The Horse. 



It is almost needless to remind you that the Elephant 

 is the largest land animal now living. There were for- 

 merly two species in existence, which were much larger. 

 The one was called the Mammoth, of which great quantities 

 of bones and tusks are found in Siberia. At the beginning 

 of the present century a complete carcase of one of these 

 animals was found imbedded in the ice at the mouth of 



' Pactiyt, thick j i/erina, the skin. 



