19 



transverse width at condyles .077 M. The fragments of teeth are too 

 uncharacteristic for specific description. Numerous cranial fragments 

 accompany the above, but have not yet been properly placed. 



The atlas is broken ; its cotyloid cavities are rather shallow, and the 

 diapophyses small. Its antero-posterior diameter below at the middle 

 line is .070 ; at base of diapophysis ".070. The condyles of the femur 

 present the characters of the group. There is a deep vertical groove on 

 the inner side just above the condyle. The latter approach each other 

 closely on each side of the intercondylar fossa and are flattened on the 

 superior posterior margins. Width across extremities M. .150. 



At a distance of one or two hundred feet from the above specimen I 

 found portions of the skeleton of a smaller animal, probably a different 

 but allied species. It is represented by portions of ribs and limbs, of which 

 the ulna is described under Uintatherium. Two or three hundred yards 

 from the typical specimen, I obtained remains of almost all parts of the 

 skeleton of what is probably the present species. The femur is identical 

 in character. The specimen embraces cervical dorsal and lumbar verte- 

 brae, ulna, both femora and tibiae, astralagus, navicular, etc., and large 

 parts of the scapulae and pelvis. 



The scapula in its proximal portions, differs little from that of Loxo- 

 lophodon cornutus besides in inferior size. The coracoid is a compressed 

 tubercle enclosing a groove with the glenoid cavity. 



M. 



Diameter glenoid cavity (longitudinal) 0.168 



" " " (transverse) 098 



The os pubis displays a strong pectineal rugosity commencing near the 

 acetabulum. 



M. 



Long Diameter of acetabulum 0. 143 



Length ischio pubic suture 108 



Diameter pubis near acetabulum 052 



The femur is nearly as long as that of Loxolophodon cornutus, but is 

 more slender, and has a relatively smaller head. It is flattened fore and 

 aft, and the great trochanter is much expanded and with a shallow con- 

 cavity on the posterior face. There is a marked concavity on the posterior 

 face of the shaft above the condyles. There is a rudiment of the little tro- 

 chanter. The tibia is scarcely three-fourths the length of the femur, and 

 has a rather contracted shaft, which is in section rounded triangular, one 

 angle presenting forwards. There is no spine except a rudiment in the 

 swollen upper portion of the anterior ridge. The articular surfaces are 

 together rather narrowly transverse. They are separated by a keel which 

 is undivided posteriorly ; anteriorly the contiguous margins of the cotyli 

 separate. The long axis of the inner of these is directed antero-posteri- 

 orly outwards in front ; of the other similar but much more transverse. 

 It overhangs the shaft outwards and backwards and supports beneath, 

 the subround down-looking fibular articular surface. The distal articu- 



