518 University of California Publications in Geology [Vol.11 



above the base, to specimens in which the antler forks only a short 

 distance above the base. Though two types, the long- antlers and the 

 short antlers, can be recognized they intergrade and evidently repre- 

 sent one species. The beam is commonly much flattened below the 

 point of division. Only rarely in the highest antlers is the shaft 

 nearly circular in cross-sections well above the base. In many cases 

 the two tines are nearly equal. Usually there is a noticeable difference. 



120 



Figs. 118 to 120. Herycodus, sp. Metapodials and digit, no. 22502, X %. 

 Fig. 118, distal end of anterior cannon bone; fig. 119, distal end of posterior 

 cannon bone; fig. 120, phalanges of digit. Barstow Miocene, Mohave Desert, 

 California. 



Fig. 121. Merycodus, sp. Distal end of anterior cannon bone and digit, 

 no. 22499, X Barstow Miocene, Mohave Desert, California. 



Fig. 122. Meryoodus, sp. Calcaneuin, no. 22501, X Barstow Miocene, 

 Mohave Desert, California. 



Fig. 123. Herycodus, sp. Astragalus, no. 22500, X %: Barstow Miocene, 

 Mohave Desert, California. 



Fig. 124a and 1246. Bovid. Axis, no. 21499, X V 2 . Fig. 124a, ventral 

 view; fig. 1246, anterior view. Barstow Miocene, Mohave Desert, California. 



The burr is present in many specimens. It is commonly near the 

 base of the horn. In some of the forms with the longest, most slender 

 beam it may be more than an inch above the base. It is absent from 

 many specimens. It may be situated immediately below the forks or 

 may be far below them. In one specimen, no. 21488 (fig. 117), there 

 is a burr on each tine above the division. In the specimen showing 



