RUPICAPRINiE 



219 



(Zool. Publ. Field Mus. vol. vi) p. 52, 1905 ; LydeUer, Gi'eat 

 and Small Game of Europe, etc. p. 329, 1901 ; Ward, Records 

 of Big Game, eel. 6, p. 351, 1910. 

 Oreamnos americanus, Hollister, Proc. Biol. Soc. Washington, vol. xxv, 

 p. 186, 1912. 



White Goat. 

 Typical locality Cascade Mountains, near Brant Island, 

 Columbia Valley, Oregon. 



General characters those of the genus. Shoulder-height 

 from about 37 to 43 inches ; coat in winter long and pendent, 

 with a dense woolly under-fur, in summer short; colour 

 wholly yellowish white, with muzzle, horns, and hoofs black. 

 The maximum recorded horn-length in Eocky Mountain race 

 is Hi inches ; the girth being 4j, and the tip-to-tip interval 



6i inches. 



The races may be distinguished as^ follows : — 



A. Fronto-parietal region of skull flattened or 



slightly convex ; horns stout, curving back- 

 wards with but little divergence. 



a. Size medium, skull broad 0. americanus americanus, 



h. Size large, skull narrow O. americanus columhice. 



c. Size small, skull nai-row O. americamcs missouke. 



B. Fronto-parietal region of skull con- 



cave ; horns slender, long, and 



greatly divergent, with more numer- . 



ous ridges than in a 0. amertcaniis Ticimedyi. 



A,_Oreamnos americanus americanus. 



Oreamnos montanus montanus, Allen, Bull. Amer. Mus. Nat. Hist. 



vol. XX, p. 19, 1904; Miller, List N. Amer. Mamm. U.b. Mus. 



p. 398, 1912. 

 Oreamnos americanus americanus, Hollister, Proc. Biol. hoc. 



Washington, vol. xxv, p. 186, 1912. 



Typical locality Cascade Mountains, as above. 



Size medium, skull broad, horns stout, slightly divergent, 

 height at shoulder 39^ inches; basal length of skull lOJ 

 inches (270 mm.); interorbital width 2-f% inches (95 mm.); 

 length of palate 6jf inches (176 mm.) ; length of upper 

 series of cheek-teeth 2 J inches (73 mm.). 



The distributional area includes high elevations in the 

 Eocky Mountains and other ranges between them and the 

 Pacific to southern British Columbia. 



* * * *. Skin, mounted. liocky ^Mountains ; collected 

 by Sir J. Eichardson. Presented by the Zoolorjical Society. 



