80 



DINOCEHATA. 



The transverse processes are sliort, and strongly tuberculated at the 

 end. The articular surfaces for the heads of the first and second ribs are 

 of about equal size, and sub-oval in outline. Thev are approximate at 

 the sides of the centrum, being separated from each other by less than 

 half their diameter. The face for the tubercular articulation of the first 

 rib is of moderate size, oval in outline, concave from liefore liaekward, and 

 much less so transversely. These articulations are about on a level with 

 the floor of the neural canal, instead of below it, as in the tapir. 



Figure 95. — First dorsal vei'teljra o£ Dinoceras mirahile, Marsh (No. I'Jl'i); front view. 

 Figure 9U. — Ttie same vertebra; side view. 



n. neural canal; r. face for head of rib; r'. face for tubercle of rib; «. neural spine; z. anlenor 



zygapophysis ; z'. posterior zygapophysis. 



Both figures are oue-lburlh natural size. 



Figure 97. — First dorsal vertebra of Tinuctras anceps, Marsh (No. 103fi); front view. 

 FijURE 9S — The same vertebra; side view. 



nc. ueural canal; z. anterior zygapophysis; z', posterior zygapophysis; n. neural spine. 

 Both figures are one-fourth natural size. 



