470 Annals of the Carnegie Museum. 



ungual phalanges are high and narrow. The tibia is long and is 

 slender below. 



Throughout the skeleton there is a general resemblance to that of 

 Antilocapra, though the bones are all heavier. There are, of course, 

 many differences in detail. The most striking differences are in the 

 teeth and the posterior portion of the skull. 



Restoration and Habitat. 



The restoration oi Drojiiomeryx here given (Plate LXI) was made 

 from two portions of skulls and skeletons, numbers 827 and 1542 of 

 the Carnegie Museum Catalogue of Vertebrate Fossils. The scapulae, 

 most of the dorsal vertebrae, the caudal vertebrae and the length of 

 the femur and the size and proportions of the lateral metapodials are 

 conjectural. The bones of the skeleton are individually heavier than 

 those oi Antilocapra and the Virginian deer, but the skeleton is grace- 

 fully proportioned. Evidently Dromomei'yx borealis was about 5 feet 

 (1.5 meters) long, over 3 feet (97 cm.) high at the shoulder. The 

 head, neck, and limbs are long, but not extremely so in proportion to 

 the size of the body. The only features which are very striking are 

 the long heavy horns with thin, peculiar wing-like processes behind 

 the orbits. These must have given to the animal a very peculiar appear- 

 ance, especially when viewed from in front. The eyes were evidently 

 large. 



Dromomeryx was well adapted to life in the open country. It 

 could undoubtedly run swiftly, quickly detect the approach of danger, 

 and, with its powerful horns, defend itself against its carnivorous ad- 

 versaries. It had not, like Profiomotherium of the same beds, strongly 

 hypsodont molars, and, like nearly all of the Merycoidodonis (Oreo- 

 donts) a deep mandible for the attachment of heavy muscles which 

 were used in the mastication of coarse vegetable food. It probably 

 occupied, in part, the same habitat as the camels (^Frocainelus, etc.) 

 and the horses {Merychippus ?), etc., which were found in the same 

 beds. 



Dromomeryx from the Lower Madison Valley in Montana. 



In the collection from the Lower Madison Valley in Montana, a 

 portion of a skull (Figs. 2 and 3), which was found in abed of pure 

 stream-sand may belong to the species Dromomeryx borealis. The size 

 is nearly the same as that of the type, and of the various specimens 



