164 DINOCERATA. 



Its surface is strongly tuberculated, especially on the under and outer 

 sides, as shown in Plate LII, figures 12 and 13. The shaft, being short, 

 does not 2^i"'i*'6nt a median constriction, as in the three preceding 

 metatarsals. 



The proximal end (figure 14) bears a comparatively small articular 

 face for supjjort on the cuboid bone. Tliis face is nearly flat, and 

 somewhat quadrangular in outline, and is confluent, on the inner margin, 

 with a small lateral face for the fom-th metatarsal, as seen in figure 11. 

 The proximal articular face is nearly at right angles to the axis of 

 the bone. 



The distal face (figure 16) for the proximal phalanx is turned strongly 

 outward, and is more or less concave. The sesamoid grooves, also, look 

 strongly out^'ard, and the inner is larger than the outer. 



The Phalanges. 

 (Plates LII-LVI.) 

 The phalanges of the hind foot in the Dlnocerata are very similar to 

 tliose of the fore foot, althoug-h smaller, and hence need no detailed 

 description. In Plate LIII, these bones are well represented, and with 

 them, some of the sesamoid bones of the same feet. In Plate LIV, figure 

 2, the phalanges are shown in position, and other views of them may be 

 seen in the two restorations on Plates LV and LVI. 



