108 
ORDERS OF MAMMALS— HOOFED ANIMALS 
known respectively as the argali, and Marco 
Polo’s sheep. The horns of the argali are the 
greatest in size and weight, and those of Marco 
Polo’s sheep have the widest spread. 
Six species of mountain sheep are found in 
has been known for exactly a century, and it is 
the species which is most widely known in Ameri- 
ca. Once quite abundant throughout the Rocky 
Mountains from Mexico to Latitude 60° in north- 
ern British Columbia, it has been so persistently 
The black dots represent actual observations. 
1. Big-Horn Sheep, ( Ovis canadensis). 
2. Mexican Sheep, (0. mexicanus). 
3. Nelson’s Sheep, (0. nelsoni). 
4. White Sheep, (0. dalli) . 
5. Black Sheep, (0. stonei). 
6. Fannin’s Sheep, (0. fannini). 
North America, of which five have been 
described since 1883. They are scat- 
tered from the northern states of Mexico 
through the Rocky Mountains almost 
to the shore of the Arctic Ocean, and 
throughout one-half of Alaska, a range 
fully 3,600 miles long. The accompanying 
map shows actual occurrences of the va- 
rious species during the past twelve years. hunted and slain that now it exists only in small 
Of our six species, four are so interesting they bands, in widely-separated localities. In most 
deserve separate notice. of our western states and territories, the killing 
The Big-Horn, or Rocky Mountain Sheep , 1 of Mountain Sheep is now prohibited for a term 
1 O'vis can-a-den' sis. of years, and it is hoped that these laws will be 
