474 Bulletin American Museiun of Natural History. [Vol. XIX, 



in about the same proportion as those of the fore-foot. The 

 phalanges are much like those of the fore-foot, except that 

 the terminal phalanx of the third digit is somewhat smaller 

 and comparatively narrower than that of the fore-foot. 



VI. Pelvis. 



The pelvis shows a marked stage of advancement. It dif- 

 fers in no esgential way from that of Eqmts, the proportions 

 throughout being about the same as in Eqnits cahallns. 



As the comparisons in the foregoing description have been 

 mainly with McsoJiippiis bairdii and Eqnits cahallns, it may 

 prove instructive to give here a comparative table of measure- 

 ments taken from skeletons representing the three genera, 

 and tables showing comparative proportions. In the latter 

 the Virginia deer is included. 



COMPARATIVE SKELETAL PROPORTIONS. 



UORSO-LUMBAR SERIES TAKEN AS STANDARD. 



Alcsoliippus ba irdii. 

 Length of skull and neck .So 

 back 

 " fore limb 

 " " hind " 



N colli p par ion ivJiiincyi. 



Length of skull and neck .95 



back 



fore limb 

 " hind " 



Equus caballus. 

 Length of skull and necl^ i .03 

 " back 

 " fore limb 

 " hind " 



Length of skull and neck i 

 " back 



fore limb 

 " hind " 



Virginia Deer. 



1.46 



I-3Q- 



