16 
GUIDE TO THE 
Beaver, the Marmot, and the Jerboas. Of the Beaver 
both species, the European Beaver, Castor fiber, which 
formerly inhabited the greater part of Europe, and 
was to be found in England as late as the twelfth 
century, but is now restricted to a few places on the 
Rhone, near Magdeburg on the Elbe, and a park on 
the banks of the Danube, and the American Beaver 
(C. canadensis), are mounted. 
The following, the third case in this row, displays 
the different sorts of 
Wild Sheep 
on the top, and some more Rodents below. 
Of the Wild Sheep we find, mostly heads, the 
Caucasian Burrhel, Ovis cylindricornis, the Mouf- 
flon of Sardinia and Corsica, Ovis musimon, the 
American Bighorn or Mountain Sheep, Ovis cana- 
densis, the Aoudad or Barbary Sheep, Ovis tragela- 
phus, an inhabitant of the mountain-ranges of 
North-Western Africa, the rare and magnificent Ovis 
poU, or Marco Polo’s Sheep, and Ovis nivicola, the 
Snow Sheep, from the Stanovoi Mountains and 
Kamtschatkan Hills. • 
The Rodents are numerous, and it will be sufficient 
here to call special attention to the beautiful collec- 
tion of varieties of the Squirrel vulgaris)', the 
Rats and Mice, among the latter the pretty little red 
Dormouse, Muscardinus avellanarius, which is common 
