Sees iets Suagese 
510 CHORDATA. 
frequent high, open, grassy plains, their limbs being adapted 
for fleet movements over hard ground. Even in a domestic 
state the horse shows a peculiar aversion to trusting itself to 
soft or boggy ground. On the other hand, the ox family 
(Bovide) is at home upon any’ grassy pasture, whether in 
forest glades or in rocky districts. The food is in each type 
much the same and the long soft lips assist greatly in 
obtaining it. We shall see below, however, that the method 
of feeding or dealing with the food is different, involving 
certain differences in the structure of the stomach. 
Fig. 350.—LATERAL VIEW OF HorsE’s SKULL. 
The right mandible has been removed. (Ad nat.) 
Frontal. Lacrymal. Nasal. 
Symphysis. 
Note complete orbit, large nasals and lacrymals, and predominant facial regions, 
In habits both families are, as a rule, gregarious, congre- 
gating in herds. This habit conduces to mutual protection, 
and is made possible by the wide expanses of pasture at 
present existent on the earth’s surface, though it involves 
more or less extensive periodic migrations from place to 
place. 
Bearing in mind both the points of similarity and of 
difference in the habits of the two types, we can pass to 
