THE THIBETAN SNOW-COCK. 279 



before me, four have the band continuous as shown in our 

 plate ; one has it interrupted as described by Prjevalsky, but 

 this has no spurs. In many birds the band running down 

 the sides of the neck and across the throat is only dark grey 

 and not nearly so dark as in the particular specimen figured. 



At LEAST three more species of this fine genus are known, viz., 

 T. CASPIUS, Gm., T. CAUCASICUS, Pall., and T ALTAICUS, 

 Gebler, and there is a fourth, which is doubtful. Of the first 

 the Gok or Geyee mountains of Southern Asia Minor constitute 

 probably the western limits. Thence it extends eastwards* 

 through the rest of the Taurus into Armenia, Kurdistan and 

 Northern Persia as far as Astrabad at the south-east corner of 

 the Caspian, whence it was first described. The other two are 

 possibly nearly confined to the mountain chains, whence their 

 names are derived. 



-. 



1/ 



Danford. Ibis, 1878, p. 29, 



