108 Nelson — A Neiv Subspecies of Pronghorn Antelope. 



and covered with numerous small knobs and wart-like protuberances; 

 horns in this form also average much more upright and less diverging 

 than in either of the other forms; molar scries heavier than in americana 

 and much heavier than in mexicana. Size about the same in all three 

 subspecies. 



Remarks. — It was unexpected to find the antelope of the remote and 

 excessively hot arid deserts of Lower California more like typical americana 

 in the dark coloring of the head than like the pale mexicana. While the 

 differences noted are not very striking they appear sufficient to char- 

 acterize a good local form. Antelope formerly ranged over nearly the 

 entire length of Lower California hut are now gone from a large part of 

 their ancient range and their steadily decreasing numbers indicate their 

 early extinction throughout the peninsula. 



