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University of California Publications in Geology [Vol. 9 



Lumbar vertebrae. — Several fragments of lumbar vertebrae have 

 been found which are probably referable to this species. No. 21446 

 is a perfect lumbar vertebra, probably the fifth, which differs from 

 that of Antiloeapra in the shape of the neural spine, which is con- 

 siderably wider along its dorsal edge than in the middle of its length, 

 and in the deep incurving of the contour in lateral view on the pos- 

 terior side of the neural spine. The centrum in this and another 

 similar specimen is of slightly different shape from that in the prong- 

 horn, being relatively broader and not so deep, enclosing a larger 

 neural canal. 



Bibs. — No well preserved ribs referable to Capromeryx have yet 

 been found, only a few fragments being at hand, from which no definite 

 comparisons may be made. 



AECHES 



Scapula. — Several broken pieces of scapulae show that while in 

 general proportions, shape, etc., there was no striking difference between 

 Capromeryx and Antiloeapra, the former was a little more like the 

 latter than like llingoceros. The anterior edge of the articular surface 

 of the glenoid cavity is well separated from the coracoid process. The 

 lateral prominence of the coracoid process is poorly developed. Viewed 

 from its proximal end, the outer border of the glenoid cavity forms 

 an even curve with the coracoid process as it does in Antiloeapra, 

 llingoceros differing from both in this respect. The anterior border 

 of the glenoid cavity is produced into a sharp ventrally projecting 

 point. The scapula of Capromeryx is about five-eighths the size of 

 that in Antiloeapra. 



Pelvis. — A few fragments of pelvis show no important points of 

 difference between the existing American antelope and the diminutive 

 extinct species. The acetabulum is relatively slightly smaller in the 

 fossil species. 



LIMB BONES 



Specimens of a considerable number of the limb bones of this 

 species have been found, and show that, as was suggested by Taylor, 

 it was a form with long, light limbs, comparable with those of the 

 pronghorn. 



A few fragments of humeri have been found, but no femur. The 

 humerus is. if anything, slightly more slender than that of Antiloeapra, 

 and very much the same in structure. 



A complete radius and a number of fragments have been found. 

 The length and proportions relative to the rest of the skeleton are not 



