120 POPULAR OFFICIAL GUIDE. 
POLAR BEARS. 
Showing a portion of their den and pool cut from the solid rock. 
The bears of North America form four well-defined groups, 
as follows: 
The Polar Bear. The Alaskan Brown Bears. 
The Grizzly Bear. The Black Bears, and their allies. 
Up to this date (June 1, 1911), 24 species and subspecies 
have been described, and it is reasonably certain that much 
more work remains to be done on the members of this group 
of animals before the status of each valid and invalid species 
will be rendered thoroughly clear. 
The most noteworthy species are as follows: 
THE MOST IMPORTANT SPECIES OF NORTH AMERICAN BEARS. 
Ursus maritimus, (Desm.), Polar Bear. 
Arctic regions generally. 
Ursus middendorfi, (Merriam), Kadiak Bear. 
Kadiak Is., Alaska. 
Ursus dalli, (Merr.), Yakutat Bear. 
Yakutat Bay, Alaska. 
Ursus eulophus, (Merr.), Admiralty Bear. 
Admiralty Is., Alaska. 
Ursus gyas, (Merr.), Peninsula Bear. 
Portage Bay, Alaska Peninsula. 
The Brown 
Bears. 
