Plate IV. Dorsal vertebra? of Barosaurns. About one-eighth natural size. 
Figure I. Dorsal V (Vertebra L), anterior aspect. 
Figure 2. Dorsal V (Vertebra L), right lateral aspect. 
Figure 3. Dorsal V (Vertebra L), posterior aspect. 
Figure 4. Dorsal IX (Vertebra N), anterior aspect. 
Figure 5. Dorsal IX (Vertebra N), right lateral aspect. 
Figure 6. Dorsal IX (Vertebra N), posterior aspect. 
Key drawing: A, anterior, P, posterior face of centrum. ADL., anterior dia- 
pophysial lamina; D., depression; HYPO., hyposphene; OB. LAM., oblique 
lamina; PDL., posterior diapophysial lamina; PZ.L., postzygapophysial 
lamina ; other lettering as in Plate III. 
