588 GEOLOGICAL SURVEY OF THE TERRITORIES. 



The teeth are slightly rugose, and the inferior canines show atendency 

 to imitate the form of the incisors in a slight basal angular expansion of 

 the crown. This forms an ajiproximation to the tapirs. The middle 

 pair of incisors is directed outward, is the smallest, and, like all the 

 others, has the roots much exposed. 



This species was originally described from teeth of the upper jaw. I 

 have since obtained the entire mandible (except the angles) taken out 

 at the same place and near the same time. The size, color, &c., would 

 indicate that they belong to the same individual. Accompanying the 

 first specimens were many bones of individuals of different sizes, which I 

 learn from the finder were all taken from within a short distance of each 

 other. Many of them belong to the same species, as the jaws and teeth, 

 and I have described as such those that relate properly to them as to 

 size, mineral appearance, &c. 



The smaller specimens belong also to several individuals, and possibly 

 to more than one species. I describe them together, but regard the 

 astragalus as the primarily distinctive bone. 



Bathmodon semicinctus. Cope. 



Proceedings American Philosophical Society, 1872, p. 420. Loxolophodon semicinchts, 



Cope 1. c. 



The tooth on which this species was based shows a near relation to the 

 corresponding one of B. radians. 



Bathmodon latipes. Cope. 



Proceedings American Philosophical Society, 1873, March. 



Established on atlas axis, dorsal and lumbar vertebrae, scapula, hume- 

 rus, phalange, femur, astragali, &c., of a specimen found with the B. 

 radians. 



The transverse process of the atlas is stouter and less flattened at the 

 base than in B. radians. The axis is but little oblique, and has a low, 

 obtuse hypapophysis below. Its form is much as in the larger species, 

 being rather elongate, but shorter than in Rhinocerns and other Perisso- 

 dactyles. The dorsals and lumbars are short and plane ; the former are 

 obtusely, the latter acutely, keeled below. The heiid of the femur has 

 no ligamentous fossa. The astragalus is considerably broader than long, 

 the apex turned outward in front of the inner malleolus, being especially 

 produced. The tibial face is concave transversely, and convex antero- 

 posteriorly at the front, plane behind. There is a posterior submarginal 

 foramen, which is not bridged over in one specimen, producing a deep 

 notch. The navicular facet has considerable transverse extent, and the 

 anterior side of the bone is more transverse than in B. radians. The 

 calcaneal facets are diagonally opposite to each other 5 the outer is sub- 

 round, the inner anterior narrow and transverse. It differs in the two 

 specimens, the perforating toramen not being bridged over in the one 

 (the type) with the similar posterior interruption described above. This 

 may be due to fracture. The only ungueal phalange has the articular 

 face not quite sessile on the transverse rugose free extremity. 



Measurements. 



M. 



Diameter diapophysis atlas, (fore and aft) 0.036 



Diameter axial facet of atlas ^\^ 



Diameter centrum axis, (transverse) ^^ 



Diameter centrum axis, (verlical) "•^'' 



