1881. Plate XVII. 
Tt ee ee 
ses os oa’ 
Figure 1.—Fourth caudal vertebra of Brontosaurus excelsus, Marsh, side 
view. 
Figure 2.—The same, front v 
In both figures the hi et of the letters is as. follows: c, face for 
chevron ; m, neural canal; s, neural spine ; t, transverse process ; 2 anterior 
zygapop hys is; 2’, sapien zy gapophysis. 
FIGURE 3,—Chevron of Bron tosaurus excelsus, _ view. 
Howse 4.—The same, front view; h, heemal canal. 
All the fisce os are vapeamgirie natural size. 
