upper vurfac ¢ 
2 
Ovis dalh, 
1 
Ovis montana. 
Teer old 
5 years old 
upper surface 
a- 
Oves fanmni. 
| 
Opts Soner. 
G years old 
9 years old 
CROSS SECTIONS OF MOUNTAIN SHEEP HORNS. 
Cross section of male right horn, three inches from base, of four species of American Mountain 
Sheep, the left side of each being the front. The smaller cross sections of Ow7s montana and dali 
(4 6) were taken midway between base and tip. 
