274 MAMMALIA. 



is placed in a line over the back edge of the second grinder, some 

 distance in front of the end of the cheek-ridge. The under sur- 

 face of the body of the posterior sphenoid is narrow and convex 

 in E. Hemionus and broad and flat in E. Kiang. The vomer is 

 much more compressed in the latter than in E. Hemionus. I am 

 not certain that the distinctions here described may be sufficient 

 to show that these two animals are separate species, but they in- 

 dicate the necessity of the subject being more fully examined. 



In the position of the suborbital foramen the E. Hemionus 

 more nearly resembles the E. Asinus, and the E. Onager that of 

 E. Zebra and E. Bur chellii. Gray, Proc. Zool. Soc. 1849, 29. 



Two of the skulls of the Equus Kiang show the small rudi- 

 mentary grinder in front of the other, but this tooth is to be more 

 or less distinctly observed in the skulls of the other Equida in 

 the Museum Collection. I may observe, that in the skull of 

 Equus Burchellii in the British Museum Collection, this tooth is 

 placed on the inner side of the first true grinder. 



The suborbital foramen in the skulls in the India House 

 from Thibet rather varies in position, but in all it is placed over 

 the middle or third tooth. In the old male it appears to be 

 rather higher than in the nearly adult female and in the young 

 skull, where the hinder grinder is just springing out. 



This animal must not be confounded with the domestic asses 

 which are used for burden in Thibet. Capt. Strachey. 



The male Kiangs are larger and deeper coloured. They live 

 in troops of from eight to ten under the care of a solitary male, 

 where the thermometer is below zero. They live partly on the 

 plains and partly on the mountains, and the lower surface of the 

 hoof varies considerably in form and concavity, perhaps from that 

 circumstance. 



The Ghoor Khur of Ludakh, according to Moorcroft, is white 

 about the nose and under the neck, the belly and legs ; the back 

 is light bay and the mane dun. They herd in droves, fly at a 

 trot, stop, and look back. H. Smith, Equidce, 310. 



Moorcroft saw the Kiangs on the highest summits of Thibet, 

 in their shining summer coats and with their antelope form, 

 scouring along in numbers. H. Smith, Equidce, 286. 



Dr. Walker observes The Kiang neighs like a horse. The 

 Wild Ass of Cutch brays like an ass. The Kiang has no zebra 

 stripes, neither in the adult nor in the foal. The Wild Ass of 

 Cutch : transverse zebra stripes are seen on the shoulder in the 

 adult, and still more in the foal. Sometimes also the shoulder 

 cross has been seen. The habitat of the Kiang is on the high 

 table-land of Thibet; of the Wild Ass of Cutch in the sultry 

 plains near the mouth of the Indus. 



The Kiang of Chinese Tartary greatly exceeds that of the 



