564 



PROCEEDIXGS OF THE XATIOXAL MUSEUM. 



vol. 48. 



enumerated, especially the upright mane and the peculiarly haired 

 tail. 



It is thought well to present a brief conspectus of the more im- 

 portant average measurements and indices which have been obtained 

 up to this point in the conclusion. 



Average measurements in millimeters and indices of Equids considered. 



Species. 



E. przevalsbii. 



E. grevyi 



E. gra nti 



E. zebra 



E. hemionus . 



E. kiang 



E. asinuz 



8 small horses 

 S large horses. 



Basilar 

 length. 



476 

 543 

 443 

 462 

 456 

 465 

 375 

 443 

 558 



Cephalic 2-jf- 



42.9 

 38.7 

 42.0 

 41.4 

 41.1 

 45.3 

 47.8 

 44.2 

 41.1 



35.1 

 35.4 

 38.5 

 38.1 

 36.0 

 35.5 

 40.6 

 36.0 

 33.0 



Facio- 

 ceph. 

 index. 



76.7 

 77.4 

 77.1 

 76.3 

 77.9 

 77.5 

 73.9 

 76.1 

 74.1 



For. mag. Vomer to 

 to vomer, palate. 



120 

 130 

 108 

 115 

 109 

 115 

 89 

 112 

 143 



103 

 141 

 107 

 111 

 115 

 116 

 93 

 96 

 118 



It appears to be a common idea that the small, broad-faced horses 

 are likewise short-faced, and that the large horses are long-faced as 

 well as narrow-faced. Eelatively the small horses which have been 

 dealt with on page 559 have a greater cranio-cephalic index than the 

 eight large ones, but they have likewise a larger facio-cephalic 

 index. It follows almost of necessity from that table that the vertex 

 length of the small horses is, as measured by the basilar length, 

 greater than in the large horses. In the following table the vertex- 

 length index has been obtained for each of the sixteen skulls used 

 in the table referred to : 



Indices of vertex length of domestic horses. 



Small horses. 



Large horses. 



Number in Xehring's 

 list. 



Index. 



Number in Xehring's 

 list. 



Index. 



13 

 14 

 15 

 16 

 18 

 20 

 21 

 23 



Average 



108.9 

 111.9 

 112.3 

 110.6 

 109.8 

 108.9 

 109.8 

 110.6 



49 

 50 

 51 

 52 

 55 

 56 

 57 

 58 



Average 



108.9 

 105.0 

 107.5 

 106.5 

 103.4 

 107.7 

 108.5 

 107.4 



110.3 



107.5 







It may seem that we have wandered away from the consideration 

 of the value of craniometrical measurements for the determination 

 of species of horses and their relationships to one another. TVe may 

 be really in a better position to aid in solving the problems. The 

 conclusions reached at present are as follows: 



1. Measurements and indices are of great value in distinguishing 

 certain species of horses from certain others. 



