EXPLANATION OF PLATES. 



PLATE IV. 



Fig. 1. Ursus sitkensis cT ad- Mainland north of Sitka. Coll. C. H. 

 Townsend. 



2. Ursus middendorffi $ yg. ad. Kadiak Island, Alaska. No. 67401, 



U. S. Nat. Mus. 



3. Ursus middendorffi tf old. Kadiak Island, Alaska. No. 55493, 



U. S. Nat. Mus. 



4. Ursus horribilis $ ad. Bighorn Mountains, Wyoming. No 67391, 



U. S. Nat. Mus. 



5. Ursus horriseus $ old- Coppermines, New Mexico. No. 990,U. S. 



Nat. Mus. 



6. Ursus richardsoni tf old. Anderson River. No. 6255, U. S. Nat. 



Mus. 



PLATE V. 



Fig. 1. Ursus dalli tf old. Yakutat, Alaska. No. 75048, U. S. Nat. Mus. 



2. Ursus middendorffi $ yg. ad. Kadiak Island, Alaska. No. 67401, 



U. S. Nat. Mus. 



3. Ursus sitkensis $ ad. Sitka, Alaska. No. 6543, Merriam Coll. 



4. Ursus horribilis tf ad. Bighorn Mountains, Wyoming. No. 67391, 



U. S. Nat. Mus. 



5. Ursus richardsoni <^ old. Anderson River. No. 6255, U. S. Nat. 



Mus. 



6. Ursus horrixus tf old. Coppermines, New Mexico. No. 990, U. S. 



Nat. Mus. 



PLATE VI. 



Fig. 1. Ursus horribilis $ ad. Bighorn Mountains, Wyoming. No. 67391, 

 U. S. Nat. Mus. 



2. Ursiis middendorffi, $ old. Kadiak Island, Alaska. No. 55493, 



U. S. Nat. Mus. 



3. Ursus richardsoni tf ad. Anderson River. No. 6255, U. S. Nat. 



Mus. 



4. Ursus horriseus $ old. Coppermines, New Mexico. No. 990, U. S. 



Nat. Mus. 



5. Ursus dalli $ old. Yakutat, Alaska. No. 75048, U. S. Nat. Mus. 



[NOTE. The photographs from which the accompanying illustrations 

 were made belong to the Division of Ornithology and Mammalogy of the 

 U. S. Department of Agriculture. They are here used by courtesy of 

 Dr. Charles W. Dabney, Jr., Assistant Secretary of Agriculture.] 



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