94 NATURAL HISTORY. 
161. The Musk Ox, Fig. 79, is a native of the cold re- 
gions of North America. It somewhat resembles the 
Fig. 79.—Musk Ox. 
Yak. It is covered with very long hair which almost 
reaches the ground. It appears in small herds, number- 
ing, perhaps, twenty or thirty. Both this animal and the 
Yak are rather small, but the thick hair covermg them 
makes them look quite large. 
_ Questions.—What are the families of the order Ruminantia? What 
is said of the usefulness of the Ruminants to man? State how well 
defined this order is compared with some others. What is the struc- 
ture of the feet of the Ruminants? What are the structure and ar- 
rangement of their teeth? What is rumination? Describe the ar- 
rangement of the stomachs of the Ruminants. Illustrate its purpose. 
What is there in some Monkeys analogous to the paunch of the Ru- 
minants? In what other respects is the organization of the Rumi- 
nants adapted to their habits? What is said of the arrangement of 
the eye? What influence has domestication on the bulk of the Rumi- 
nants? What partial exceptions are there to the general timid habits 
of this order? What distinguishes the Bovide from the other fami- 
lies? What is said of the distribution of the Ox, and of its varieties? 
What is said of the Bos Indicus? Where are the true Buffaloes 
found? How are they useful to man? What is said of the Ameri- 
can Bison? What of its usefulness to man? What is said of the 
Yak? What of the Musk Ox ? 
