DINOCERATA. 579 



equally fore and aft, and not posteriorly only as in the elephants. The 



glenoid cavity is flattened so as to be longitudinal, and the coracoid is a 



rudimental tuberosity. 



Measurements of scapula. 



Total length (25.25 inches) 640 



Total width 480 



Length of apex from spine 140 



Elevation of spine proximally 125 



Length of glenoid cavity 185 



Width of glenoid cavity 110 



The interior side of the scapula is strongly convex by the develop- 

 ment of two longitudinal ribs, one corresponding to each foesa, but concave 

 in longitudinal section. 



The proximal end of the radius exhibits two facets oblique to each 

 other, the larger concave and transverse, the other oblique downward. 

 Transverse width M. 0.130; vertical .070. The extremity of a humerus 

 not found with this individual, to which the radius appHes pretty well, has 

 a very oblique trochlear face, and measures seven inches across the con- 

 dyles. It, however, belongs to a smaller species. 



The femur is entire. Like that of other species of the group it is much 

 expanded proximally and deep distally, with the shaft contracted and some- 

 what flattened in the plane of the great trochanter. The latter is in one 

 plane, with its external margin turned a Httle backwards. The head is part 

 of a globe, and is a little more elevated than the trochanter, and separated 

 from its apex by a shallow concavity. There is no little trochanter. The 

 rotular face is not elevated nor wide, and with lateral borders subequally 

 developed. The anteroposterior axis of the condyles is somewhat oblique 

 to a line at right angles to the proximal end. This is because the interior 

 condyle is the longer; its articular face is continuous with the rotular, 

 with a marginal notch; the outer condyle is continuous with continuous 

 outer margin. Strong ridges revolve from above the condyles to the pos- 

 terior face of the shaft, the inner near the condyle. The outer runs parallel 

 to the main axis as a low external ala, and backwards three inches above 

 the condyle. The face between them is concave. 



