R. S. Lull — New Tertiary Artiodactyls. 129 



says, belong to a larger and more brachyodont phylum of 

 Cervidse, with supraorbital horns of peculiar type. They 

 are distinct from Blastomeryx, probably also from the 

 true Palceomeryx, but at present of uncertain relationship. 

 These four species Douglass (1909) 15 has referred to 

 a new genus Dromomeryx, the characters of which he 

 describes in detail : 



. Size greater than that of an ordinary specimen of 

 Odocoileus americana or Antilocapra americana, at least 

 the bones are heavier. Skull long, crest of the occiput 

 produced backward, face quite long, orbit large, malar 

 below the orbit projects outwardly. Horn cores large 

 and simple, and they expand outward below into heavy 

 lateral wings behind the upper portions of the orbits. 

 They stood nearly perpendicular to the upper plane of 

 the skull. There are no lachrymal pits. Oblong vacuity 

 in upper portion of face anterior to orbit. Parieto- 

 temporal suture below the middle of the brain-case. 

 Basi-cranial and basi-facial axis form a considerable 

 angle. Palate quite broad between cheek teeth, narrow 

 anterior to them (probably indicative of absence of 

 canines). Mandible long, not deep, and curves down- 

 ward beneath molars and premolars. Teeth brachy- 

 odont, with a tendency to become hypsodont, and with 

 quite prominent pillars on anterior portions of all the 

 outer crescents of the upper cheek. Lower molars have 

 median outer pillars on teeth and "Palceomeryx folds" 

 on the anterior outer crescents. Neck and limbs long 

 but heavier than those of Odocoileus and Antilocapra. 

 At least vestiges of lower portions of lateral metapodials. 

 Humerus proportionately larger than in Antilocapra. 

 Radius and ulna separate, trapezoid and magnum, navic- 

 ular and cuboid united. Distal keels of metapodials 

 high, unguals high and narrow. 



The species of "Blastomeryx" described by Scott in 

 1890 can not be distinguished from Aletomeryx from 

 either his description or his figures, except that the ulna 

 of Aletomeryx, which is preserved for at least half its 

 length, can not be described as being ' ' hardly more than 

 a thread of bone," as it is well developed, more like a 

 ribbon than a thread (see figs. 1, 16 B). Scott does not 

 describe the character of the horn other than to say that 



15 Ann. Carnegie Mus., vol. 5, pp. 457-479. 



