CAPKINJ5 111 



e' . Size larger, ears and tail shorter, coat 

 thicker and greyer, and horns less 

 distinctly triangular 0. c. aierrce. 



/'. General colour whitey brown, lighter 



than in nelsoni 0, c. cremnobates. 



b. Ears larger. 



a". No dorsal stripe; ears 4 in 0. c. mexicana. 



b". A. dorsal stripe; ears 6 in 0. c. gaillardi. 



B. Size smaller, horns slender and more divergent, 

 with the tips sharp and entire ; ears small, 

 blunt, and thickly haired. 



a. Ears moderately small; skull medium in 



length. 

 a'. General colour white. 



a". Interval between paroccipital and 



m. 3, 94 mm 0. c. dalli. 



b". Same interval 84 mm 0. c. kenaiensis. 



b'. General colour grey on back 0. c. fannini. 



c'. General colour blackish or black. 



a". General colour blackish brown, 



exclusive of rump-patch 0. c. stonei. 



b". General colour deep black 0. c. cowani. 



b. Ears very small and blunt ; skull very short. 



c. Ears very small and blunt; facial portion 



of skull very short. 



a'. Bump-patch small; face uniformly 

 whitish ; colour slaty grey, or grey- 

 fawn 0. c. nivicola. 



b'. Hump-patch larger; face with a trans- 

 verse dark band ; general colour light ; 

 ears slightly larger 0. c. borealis. 



c'. Imperfectly known 0. c. alleni. 



A. Ovis canadensis canadensis. 



Ovis canadensis typica, Lydekker, Wild Oxen, Sheep, and Goats, 

 p. 209, pi. xvii, 1898, Great and Small Game of Europe, etc. p. 10, 

 1901 ; Ward, Eecords of Big Game, ed. 6, p. 391, 1910. 



Ovis cervina cervina, Allen, Bull. Amer. Mus. Nat. Hist. vol. xxxi. 

 p. 23, 1912 



Ovis canadensis canadensis, Miller, List Mamm. U.S. Mus. p. 395, 

 1912. 



Typical locality near Calgary, Alberta. 



Size large (40 inches at shoulder) ; horns massive, 

 moderately divergent, with the tips generally broken in 

 adults ; coat, in winter, harsh, stiff, and of moderate length ; 

 ears medium, broad, pointed, with moderately thick hair. 

 General colour of upper-parts greyish brown of varying 



