56 THE PEJEVALSKY HOESE. 



CALCANEUM AND ASTRAGALUS.— These have ahiiost pre- 

 cisely the same dimensions as have the same bones of the Tarpan. 

 The greatest difference — amounting to 4 mm. — is in the length of 

 the calcaneum. The difference in the size of the other bones does 

 not exceed 3 mm. : — 



£. prjevalskii. Tarpan. 

 mm. mm. 



Greatest length of the calcaneum ... ... ... ... 100 104 



Greatest width of the calcaneum at the sustenaculum tali ... 60 57 



Greatest diagonal length of the trochlea of the astragalus ... 72 70 



Width of the articular surface for scaphoid ... ... ... 48 49 



Antero-posterior diameter of the articular surface for scaphoid 34 33 



THE METATARSUS.— That wliich has been said for the other 

 bones of the extremity holds good for the metatarsus also. There 

 is a remarkable absence of dift'erences in its dimensions in E. 

 2)rjevalskii and the Tarpan: — 



E. prjevalskii. Tarpan. 



mm. mm. 



Greatest length of metatarsus 262 256 



Anterior length in the middle line 258 252 



Length on the outer side ... ... ... ... ... 252 244 



Width of the proximal end 49 46 



Width in the middle of the shaft 31 29 



Width of the distal end 47 46 



Thickness of the proximal part of the inner rudimentary 1 ,„ ,r> 



metatarsal bone (II.) j 



Width of the proximal end of the inner rudimentary 1 pn lo 



metatarsal bone (II.) 

 hickness of the proxir 

 metatarsal bone (IV.) 



Thickness of the proximal end of the outer rudimentary 1 in ip 



Width of the proximal end of the outer rudimentary 1 90 90 



metatarsal bone (IV.) ... ... ... ... ... J 



The Geographical Distribution and Habits of 

 Equus Prjevalskii. 



From the statements found in the literature upon the distribu- 

 tion of Prjevalsky horse, and from the data accumulated by the 

 capture of those animals which have been transferred to the Zoo- 

 logical Museum, it may be concluded that the horse is an inhabi- 

 tant of the Dzungaria and Kobdo districts of the Gobi Desert. 

 The skins, skulls and skeletons (Nos. 3,074, 3,091-3,093) received 

 from G. E. and M. E. Grum-Grjimailo were obtained from animals 

 captured, as appears from the report of the expedition,* in 

 the Gashun valleys. In the same report — whicli contains valuable 

 statements relative to the habits and disposition of the Prjevalsky 

 horse, as well as a fascinating description of the hvmting of this 



* Op. cit. pp. 188-211. 



