38 HOOFED ANIMALS 
was very different. From the place of its nativity—let us 
say the Altai Mountains—there stretches northeastward 
through Siberia and Kamchatka, Alaska, and thence down to 
British Columbia and northern Mexico a practically unbroken 
chain of mountain sheep 7,500 miles long. From northern 
India to northern Mexico the species stand in the following 
order: Burrhel and Urial, Argali and Polo’s Sheep, Siar Sheep, 
Kamchatkan Sheep, White Sheep, Black Sheep, Big-Horn and 
Mexican Sheep. 
MEASUREMENTS IN INcHES oF Extra Larce Mountain SHEEP Horns 
IN AMERICAN COLLECTIONS 
BASAL LENGTH 
CIRCUM- ON OUTER 
LOCALITY FERENCE CURVE SPREAD 
SIBERIAN ARGALI.Ovis ammon..... Central Asia...... 191% 591% 40 
Marco Poto’s : ; : 
Seis | Ovis poli........Central Asia.. .. 1534 6034 50 
Srar SHEEP...... Ovis siarensis....Central Asia... ... 15144 471% 301% 
KARELIN SHEEP. . Ovis karelini. .Chinese Turkestan 13144 4414 36 
: . | Pinacate Mts., 
PINACATE SHEEP. . Ovis canadensis N. W. oo 7 29144 19% 
LOWER ee Ovis cremnobates .Lower California.. 164% 42144 2534 
NIA SHEEP... 
Bic-Horn.... ..Ovis canadensis..S. W. Alberta. .... 1734 40 25 
MEXICAN SHEEP... Ovis mexicanus..Chihuahua, Mexico 1614 35 181% 
Buack SHEEP... .Ovis stonet.... . British Columbia... 14 44 Q5 
Waitt SHEEP... .Ovis dalli..... .N. W. Yukon Terr 143g 44384 3414 
Kenat WHITE Ovis dallt Kenai Peninsula, 
SHEEP...... | kenaiensis.. . | Alaska....... | Is A 
It requires no stretch of the imagination to behold Bering 
Strait choked with the great polar ice-pack, and hardy, 
strong-limbed bears, wolves, mountain sheep and reindeer 
crossing over the sixty miles that now separate Asia from 
Alaska, and spreading in all directions over North America. 
