NO. 2086. 



SOME MAMMALS OF THE PLEISTOCENE-HAY. 



571 



not a large horse, and that this horse possessed a more heavily built 

 skeleton than the Arabian had. 



It may be profitable to institute a comparison between the fore limb 

 of the Arabian horse and a fore limb numbered 7857 in the National 

 Museum. It was found by Hatcher in the same quarry where were 

 found the bones just described. From an examination of the table 

 given on page 569 we gain the following results regarding the various 

 bones of the Arabian as having the value of 100. 



Relative measurements of bones of fore leg of Arabian horse and of the fossil 



No. 1857. 



Bones compared. 



Arabian. 



No. 7857. 



Humerus 



100 

 100 

 100 

 100 

 100 



94 



Radius 



93.2 



Metacarpal 3 



92.5 



First phalange 



95.2 



Second phalange 



102.8 







The horse No. 7857, as indicated by the bones of the fore leg, 

 was larger than the supposed E. laurentius, but yet smaller than the 

 Arabian. By adding the lengths of the humerus, the radius, the 

 third metacarpal, and the first phalange of each of the two horses 

 there is obtained for the leg of the Arabian 975 mm. and for that 

 of No. 7857, 911 mm. The latter forms 93.4 per cent of the former. 

 This may be fairly taken as representing the relative lengths of the 

 two legs and the relative heights of the two horses. The latter seems 

 to have had a height of 13.25 hands, 53 inches, 1,347 mm. 



The fore leg, which has the number 7923, found in the same quarry 

 as the bones referred to E. laurentius and those having the number 

 7857, has a size not greatly different from that of the last one men- 

 tioned. The following table shows the results of a comparison of 

 the length of the principal bones with those of the Arabian, those 

 of the latter being regarded as having the value of 100. 



Relative measurements of bones of Arabian Jwrse and of a fossil horse. 



Bones. 



Arabian. 



No. 7923. 



Humerus 



100 

 100 

 100 

 100 

 100 



97.3 



Radius 



92.3 



Metacarpal 



100.0 



First phalange 



104.8 



Second phalange ; 



117.1 







A comparison of the table just given with the one preceding it 

 will show that the horse represented by the bones numbered 7923 

 belonged to a larger horse than those numbered 7857; the height 

 was about 13.8 hands, 55.4 inches, 1,409 mm. It may be observed, 



