94 CATALOGUE OF UNGULATES 



forming more than a complete 



circle ; length from 59 to 62 in., / i (b^ 



girth 18 to 20 in. No ruff* 0. a. ammon. (jj^ 



h'. Horns less everted, with first turn 

 nearly vertical, forming about a 

 circle, and front outer angle often 



distinct ; length from 48^ to 57 in., « 



girth 17 to 19 in. A ruff at all 1\S>*A 



seasons* 0. a. hodgsoni. ^ 



c'. Closely allied to last, but with front 

 outer angle of horns rounded off. 

 Known horns ranging from 41 to 

 5O2 in. in length, with a girth of 



from 16^ to 18 in 0. a. mongolica. y 



(V . Horns smaller ; length from about 45 2 ^jr 



to 47 in., girth 14^ to 15^ in 0. a. sairensis. 



b. Horns slighter and forming a more open 

 curve, frequently with outer front 

 angle strongly pronounced. 

 a'. General colour in winter rufous, thighs 

 coloured like back, no distinct 

 rump -patch, tail yellowish above, 

 muzzle white ; throat-ruff yel- 

 lowish. 

 Horns moderately extended; length 



55 to 58 in., girth 17 in 0. a. littledalei. 



h' . General colour in winter pale fawn, 

 thighs, rump-patch, tail, and ruff 

 white ; face light-coloured. 

 a". Horns of general type of little- 

 dalei, but apparently somewhat 



-pM\ 





'J^"^, 



thicker; rump-patch small 0. a. harelini. 



h" . Horns of same general tjpe, but 

 with outer front angle fre- 

 quently rounded off; rump- 

 patch larger 0. a. humei. 



c" . Horns slender and forming a more 

 open and extended spiral than 

 in any of the other races, with 

 front outer angle generally pro- 

 nounced ; length of fine speci- 

 mens 69 to 75 in., girth 14^ to /O ^ 



16 in., or, rarely, 17 in 0. a. ;poli. ^\ir^ 



Size smaller. 



a. General colour in winter dark brown, 

 gradually shading into white of 

 imder-parts, a white rump-patch 



and muzzle, tail greyish brown . 



above, throat-ruff greyish white. AaV^ 



Horns of the littledalei type; V" >^ 



length 35| to 38 in., girth 10 J in. 0. a. nigrimontana. V 

 h. Imperfectly known. Horns apparently H^ 



more of the ammo7i form ; length a '^$v*^ 



in type 40 in., girth 11^ in 0. a. storcki. YAir 



* Blanford, Proc. Zool. Soc. 1896, p. 787. 



